As soon as I press left click the pack crashes, crash report follows:

A---- Minecraft Crash Report ----
// Ooh. Shiny.

Time: 8/20/20 3:55 AM
Description: Unexpected error

java.lang.IllegalArgumentException: Unknown key name: q
at net.minecraft.class_3675.method_15981(class_3675.java:461)
at net.kyrptonaught.diggusmaximus.DiggusMaximusMod.isKeybindPressed(DiggusMaximusMod.java:51)
at net.minecraft.class_636.handler$bii000$DIGGUS$BLOCKBREAK(class_636.java:1588)
at net.minecraft.class_636.method_21706(class_636.java)
at net.minecraft.class_636.method_2910(class_636.java:159)
at net.minecraft.class_310.redirect$bgf000$checkForEntity(class_310.java:12307)
at net.minecraft.class_310.method_1536(class_310.java:1369)
at net.minecraft.class_310.method_1508(class_310.java:1656)
at net.minecraft.class_310.method_1574(class_310.java:1507)
at net.minecraft.class_310.method_1523(class_310.java:994)
at net.minecraft.class_310.method_1514(class_310.java:654)
at net.minecraft.client.main.Main.main(Main.java:215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:192)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at net.minecraft.class_3675.method_15981(class_3675.java:461)
at net.kyrptonaught.diggusmaximus.DiggusMaximusMod.isKeybindPressed(DiggusMaximusMod.java:51)
at net.minecraft.class_636.handler$bii000$DIGGUS$BLOCKBREAK(class_636.java:1588)
at net.minecraft.class_636.method_21706(class_636.java)
at net.minecraft.class_636.method_2910(class_636.java:159)
at net.minecraft.class_310.redirect$bgf000$checkForEntity(class_310.java:12307)
at net.minecraft.class_310.method_1536(class_310.java:1369)
at net.minecraft.class_310.method_1508(class_310.java:1656)

-- Affected level --
Details:
All players: 1 total; [class_746['CreepyHobo'/188, l='ClientLevel', x=170.37, y=65.00, z=188.83]]
Chunk stats: Client Chunk Cache: 841, 573
Level dimension: minecraft:overworld
Level spawn location: World: (147,63,158), Chunk: (at 3,3,14 in 9,9; contains blocks 144,0,144 to 159,255,159), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 1578 game time, 1578 day time
Server brand: fabric
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.class_638.method_8538(class_638.java:449)
at net.minecraft.class_310.method_1587(class_310.java:2181)
at net.minecraft.class_310.method_1514(class_310.java:677)
at net.minecraft.client.main.Main.main(Main.java:215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:192)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

-- System Details --
Details:
Minecraft Version: 1.16.1
Minecraft Version ID: 1.16.1
Operating System: Mac OS X (x86_64) version 10.15.6
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 6062455688 bytes (5781 MB) / 8589934592 bytes (8192 MB) up to 8589934592 bytes (8192 MB)
CPUs: 8
JVM Flags: 8 total; -Xss1M -Xmx8G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
adabraniummod: Adabranium Mod 1.1.5.1
adorn: Adorn 1.10.0+1.16.1
advancements-enlarger: Advancements Enlarger 0.2.2
amecsapi: Amecs API 1.0.2+1.16-rc1
angerable-patch: Angerable Patch 1.0.0-1.16.1
appleskin: AppleSkin 1.0.11
artifice: Artifice 0.8.0+1.16-rc1
astromine: Astromine 1.5.2
autoconfig1u: Auto Config v1 Updated 3.2.0-unstable
bambootweaks: Bamboo Tweaks unspecified
bebooks: Better Enchanted Books 1.1.1
bedspreads: Bedspreads 1.0.0-1.16.1
bettergraves: Better Graves 0.3.0
blockus: Blockus 1.6.2
blue_endless_jankson: jankson +
boringbackgrounds: Boring Backgrounds 2.1.0-1.16.pre3
bunch-o-trinkets: Bunch O' Trinkets 1.0.1
campanion: Campanion 1.1.13+build.35
cardinal-components: Cardinal Components API 2.4.2
cardinal-components-base: Cardinal Components API (base) 2.4.2
cardinal-components-block: Cardinal Components API (blocks) 2.4.2
cardinal-components-chunk: Cardinal Components API (chunks) 2.4.2
cardinal-components-entity: Cardinal Components API (entities) 2.4.2
cardinal-components-item: Cardinal Components API (items) 2.4.2
cardinal-components-level: Cardinal Components API (world saves) 2.4.2
cardinal-components-util: Cardinal Components API (utilities) 2.4.2
cardinal-components-world: Cardinal Components API (worlds) 2.4.2
cavebiomes: Cave Biomes 0.2.4
chainmail: Chainmail 0.3.0
cherishedworlds: Cherished Worlds 1.0.1-1.16.1
chunkpregen: Fabric Chunk Pregenerator 0.2.2
cinderscapes: Cinderscapes 1.0.7+build.43-1.16.1
cleancut: CleanCut mc1.16-2.1-fabric
cloth-api: Cloth API 1.0.8
cloth-armor-api-v1: Cloth Armor API v1 1.0.8
cloth-basic-math: Cloth Basic Math 0.5.1
cloth-client-events-v0: Cloth Client Events v0 1.0.8
cloth-common-events-v1: Cloth Common Events v1 1.0.8
cloth-config2: Cloth Config v4 4.6.0
cloth-durability-bar-api-v1: Cloth Durability Bar API v1 1.0.8
cloth-scissors-api-v1: Cloth Scissors API v1 1.0.8
cloth-utils-v1: Cloth Utils v1 1.0.8
coderecipes: Programmatic Recipes 0.3.1
com_moandjiezana_toml_toml4j: toml4j 0.7.2
compactstatuseffects: Compact Status Effects 1.2.0
compressedblocks: Compressed Blocks 1.0
controlling: Controlling For Fabric 1.1.2
cotton: Cotton 1.0.5
cotton-cauldron: Cotton Cauldron 1.0.4
cotton-commons: Cotton Commons 1.0.4
cotton-config: Cotton Config 1.0.0-rc.7
cotton-datapack: Cotton Datapack 1.0.5
cotton-logging: Cotton Logging 1.0.0-rc.4
cotton-player-events: Cotton Player Events 1.0.2
couplings: Couplings 1.3.1
craftable_utilities: Craftable Utilities 1.0.1
craftpresence: CraftPresence 1.6.6
creativebuttonmover: Creative Button Mover 0.2.5
crookedcrooks: Crooked Crooks 1.2.1+1.16.1
crusade: Crudade Mod 1.1.2
dankstorage: Dank Storage 1.1d_1.16.1
diggusmaximus: Diggus Maximus 1.3.0-1.16
dishes: Delicious Dishes 1.0.3
dml-refabricated: Deep Mob Learning: Refabricated 0.2.0-beta1
dynamicfps: Dynamic FPS 1.1.4
dynocaps: DynoCaps 1.1.1
ecotones: Ecotones 0.5.1
eggtab: Egg Tab 1.2.0+1.16-fabric
endreborn: End: Rebellion 1.6
expandedstorage: ExpandedStorage 5.3.16
experimentaway: ExperimentAway 1.0.0
ezpas: Ezpas 1.0.4
fabric: Fabric API 0.17.0+build.386-1.16.1
fabric-api-base: Fabric API Base 0.1.3+12a8474cb0
fabric-biomes-v1: Fabric Biomes (v1) 0.2.7+059ea86602
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.4+c6a8ea8902
fabric-command-api-v1: Fabric Command API (v1) 1.0.8+5ce5339802
fabric-commands-v0: Fabric Commands (v0) 0.2.0+52d3083602
fabric-containers-v0: Fabric Containers (v0) 0.1.8+045df74f02
fabric-content-registries-v0: Fabric Content Registries (v0) 0.1.9+059ea86602
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+b7f9825d02
fabric-diagonal-panes: Fabric Diagonal Panes 0.3.0
fabric-dimensions-v1: fabric-dimensions-v1 1.0.0+a71b305302
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.3.3+7066030fb0
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.0+16acbe5b02
fabric-furnaces: Fabric Furnaces 1.3.1-1.16.1
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.0+fe81e12502
fabric-item-api-v1: Fabric Item API (v1) 1.0.0+16acbe5b02
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.0+438f963602
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.1+f404f3be02
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.0+3fa9f7c5b0
fabric-language-kotlin: Fabric Language Kotlin 1.3.71+build.1
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.2.0+e83e061c02
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.0+386eb69e02
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.2+b764ce9902
fabric-models-v0: Fabric Models (v0) 0.1.0+dfdb52d602
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.5+b50ffc7b02
fabric-networking-v0: Fabric Networking (v0) 0.1.10+e00ecb5f02
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.5.7+2242e77202
fabric-object-builders-v0: Fabric Object Builders (v0) 0.6.1+a2d21ddd02
fabric-particles-v1: fabric-particles-v1 0.2.1+0a6f2a7002
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.3.8+7dba2d6c02
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.2.13+eae12eb802
fabric-renderer-indigo: Fabric Renderer - Indigo 0.3.4+34d6c87102
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 2.1.0+be551d3c02
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.3+b7f9825d02
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.8+b7084faa02
fabric-rendering-v0: Fabric Rendering (v0) 1.1.0+5341049002
fabric-rendering-v1: Fabric Rendering (v1) 1.1.2+346247d702
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.2.6+f41e209802
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.0+97324d1102
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 0.2.7+a4c57d8e02
fabric-textures-v0: Fabric Textures (v0) 1.0.4+eae12eb802
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.1+91fca5cd02
fabricloader: Fabric Loader 0.9.2+build.206
fatxporbs: Fat Experience Orbs 0.0.7
fermion: Fermion 2.1.191
fermion-modkeys: Fermion Modifier Keys 1.8.180-snapshot
fiber: fiber 0.23.0-1
flesh2leather: Flesh2Leather 1.0.0
flonters: Flonters 1.1.0+1.16.1
flora-doubling: Flora Doubling 1.1.2
gameinfo: GameInfo 2.0.0a-experimental-06 1.16.1
givemehats: Give Me Hats! 1.2.8
glassdoor: Glass Doors 1.4.4-1.16
glassential: Glassential 1.16.1-1.1.4
golemsgalore: Golems Galore 0.1.4+mc.1.16.1
hard-hat-steve: Hard Hat Steve 1.1.1
harvest: Harvest 1.2.12
healthoverlay: Health Overlay 3.6.12
horseinfo: Horse Info 0.2.2-1.16.1
iknowwhatimdoing: I Know What I'm Doing 3.0.0
improved-stations: Improved Stations 2.0.2-unstable
indrev: Industrial Revolution 1.4.9-BETA
inmis: Inmis 1.2.0-1.16.1
intotheomega: Into the Omega 1.0.1-beta-1.16.1
inventorysorter: Inventory Sorter 1.7.0-1.16
iron-jetpacks: Iron Jetpacks 0.2.5
jankson: Jankson 3.0.0+j1.2.0
jumploader: Jumploader 2.0.1
jumpoverfences: JumpOverFences 1.16-0.0.3
kibe: Kibe 1.1.12-BETA
ktdatataglib: KtDataTagLib 1.3.4
kubejs: KubeJS 1.1.2
kyrptconfig: Kytpt Config 1.1.0-1.16
libblockattributes_core: LibBlockAttributes (Core) 0.7.1-pre.4
libblockattributes_fluids: LibBlockAttributes (Fluids) 0.7.1-pre.4
libblockattributes_items: LibBlockAttributes (Items) 0.7.1-pre.4
libcd: LibCapableData 2.5.0+1.16.1
libgui: LibGui 2.2.0+1.16.1
library_of_exile: Library of Exile 1.0.1
libstructure: Libstructure 1.3
lightoverlay: Light Overlay 5.4.1
linkart: Linkart unspecified
linkedstorage: Linked Storage 1.3.5-1.16
lithium: Lithium 0.5.1
magna: Magna 1.3.2-1.16.1
mambience: MAmbience 2.1.0-1.16
minecraft: Minecraft 1.16.1
mm: Manningham Mills 2.0
mo_glass: Mo Glass 1.3-MC1.16.1
modmenu: Mod Menu 1.14.5+build.30
moreberries: More Berries 1.3.1
morepaths: More Paths 0.0.2
mostructures: Mo' Structures 1.0.0-pre2+mc.1.16
mousewheelie: Mouse Wheelie 1.5.0+mc1.16.1
netheritehorsearmor: Netherite Horse Armor 0.4.0+1.16.1
ninjaphenix-container-lib: NinjaPhenix's Container Library 1.1.5
notes: Notes 1.0.1
okzoomer: Ok Zoomer 4.0.0-alpha.5+1.16.1
org_codehaus_groovy_groovy: groovy 3.0.3
org_codehaus_groovy_groovy-jsr223: groovy-jsr223 3.0.3
org_jetbrains_annotations: annotations 17.0.0
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 1.3.71
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 1.3.71
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 1.3.71
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 1.3.71
org_jetbrains_kotlinx_kotlinx-coroutines-core: kotlinx-coroutines-core 1.3.5
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.3.5
p3utils: P3NG00's Utilities 0.0.0
packages: Packages 1.0
parchment: Parchment 1.0.2+1.15.2
patchouli: Patchouli 1.16-39-FABRIC
phosphor: Phosphor 0.6.0+build.7
playerabilitylib: Pal 1.2.0
quickshulker: Quick Shulker 1.1.5-1.16
reach-entity-attributes: Reach Entity Attribute 1.0.1
reborncore: Reborn Core 4.3.4+build.64
repurposed_structures: Repurposed Structures 1.4.1
respawnablepets: Respawnable Pets 4
ringsofascension: Rings of Ascension 1.0.6
riverredux: River Redux 0.1.4
roughlyenoughitems: Roughly Enough Items 4.10.5
roughlyenoughresources: Roughly Enough Resources 2.0.2
sandwichable: Sandwichable 1.1.1-snapshot
secretrooms: Secret Rooms 0.9.1+1.16.1
shapes: Shapes 2.0.0+build.10
shulkerboxtooltip: Shulker Box Tootip 2.1.0+1.16.1
simpledrawers: Simple Drawers 1.8.0-1.16.1
simpleteleporters: Simple Teleporters 2.2.0
simplevoidworld: Simple Void World 4.0.0
simplexterrain: Simplex Terrain 0.6.5
slabhelper: Slab Helper 1.3.2
slight-gui-modifications: 'Slight' GUI Modifications 1.2.0
slotlink: slotlink 1.0.3+minecraft-1.16.1
smoothbedrock: Smooth Bedrock (Fabric) 1.2.3
soulbound: Soulbound 1.0.1
spinnery: Spinnery 3.1.13
staffofbuilding: Staff of Building 1.2.0-1.16
static-content: Static Content 1.0.0-1.16.1
staticdata: Static Data 1.1.2
step-height-entity-attribute: Step Height Entity Attribute 1.0.0
stonecutter-tweaks: Stonecutter Tweaks 1.1.0-1.16
structure-helpers: Structure Helpers 2.1.0
structurized: Structurized 1.0.0
survivalisland: Survival Island 0.1.5
tacocraft: TacoCraft 1.3.1+mc.1.16
team_reborn_energy: Energy 0.1.0
techreborn: Tech Reborn 3.4.5+build.88
terraform: Terraform 2.1.7+build.31
terrestria: Terrestria 2.0.4+build.50
trapexpansion: Trap Expansion 1.3.2
traverse: Traverse 2.2.14+build.28
trinkets: Trinkets 2.6.3
tweed: Tweed API 3.0.0-beta.9
universalcomponents: Universal Components 0.7.2+1.16-pre2
vanilla-hammers: Vanilla Hammers 2.0.3-1.16.1
vanillaexcavators: Vanilla Excavators 1.1.0
vanillaplusbiomes: Vanilla Plus Biomes 0.2.2
villagerhats: Villager Hats fabric-1.16-rc1-1.0.0
waila: Hwyla 1.9.22
winged: Winged Mod 1.16-1.2
wolveswitharmor: Wolves With Armor 1.5.1-1.16.1
woods_and_mires: Woods and Mires 1.0.0+1.16.1
wrenchable: Wrenchable 1.0.0+1.16.1
xaerominimap: Xaero's Minimap 20.19.0
xaeroworldmap: Xaero's World Map 1.9.0
Patchouli open book context: n/a
Launched Version: fabric-loader-0.9.2+build.206-1.16.1
Backend library: LWJGL version 3.2.1 build 12
Backend API: AMD Radeon R9 M395X OpenGL Engine GL version 2.1 ATI-3.10.16, ATI Technologies Inc.
GL Caps: Using framebuffer using ARB_framebuffer_object extension
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Resource Packs: vanilla (incompatible), slightguimodifications:cts_textures, secretrooms:client_pack, kubejs:resource_pack, virtual/fabric-diagonal-panes:models, linkedstorage:enderstorage
Current Language: English (US)
CPU: 8x Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz

Problem seems to be this:
"java.lang.IllegalArgumentException: Unknown key name: q"

In the config.json5 file for diggusmaximus, try changing:

"keybinding": "q",

to

"keybinding": "key.keyboard.q",

Restart the pack.

Thanks! Working perfect now!

Thank You , was having the same issue! Works Great