Incomplete set of tags error. Does not connect to locally hosted A&B server and does not connect to test server test.prisionfun.com.
Tried with Java 11 and Java 8. Tried removing the oretweaker mod which was associated with errors. Tried copying the mods to my regular forge launcher, deleting the mods from the A&B server but not the client. Same error message regardless of server mods.
Log message

18:58:13.652
net.minecraftforge.fml.network.NetworkRegistry
Netty Client IO #0
Channels [mantle:network,xkdeco:xkdeco,exchangers:main_channel,antiqueatlas:main,computercraft:network,flywheel:network,metalbarrels:main_channel,tconstruct:network,constructionwand:main,libvulpes:main_channel,create:network,endergetic:net,chiselsandbits:chiselsandbits,cosmeticarmorreworked:main,desolation:desolation,lootr:main_network_channel,culinaryconstruct:main,moreminecarts:example,inventorysorter:net,occultism:main,waterstrainer:main,storagedrawers:main_channel,paintings:paintingchannelnetwork,abnormals_core:net,curios:main,prettypipes:network,crashutilities:network,exoticbirds:main,selene:network,supplementaries:network,strawgolem:main,patchouli:main,chisel:main,xreliquary:channel,structurescompass:network] rejected vanilla connections
18:58:13.874
net.minecraftforge.fml.network.NetworkRegistry
Netty Client IO #1
Channels [mantle:network,xkdeco:xkdeco,exchangers:main_channel,antiqueatlas:main,computercraft:network,flywheel:network,metalbarrels:main_channel,tconstruct:network,constructionwand:main,libvulpes:main_channel,create:network,endergetic:net,chiselsandbits:chiselsandbits,cosmeticarmorreworked:main,desolation:desolation,lootr:main_network_channel,culinaryconstruct:main,moreminecarts:example,inventorysorter:net,occultism:main,waterstrainer:main,storagedrawers:main_channel,paintings:paintingchannelnetwork,abnormals_core:net,curios:main,prettypipes:network,crashutilities:network,exoticbirds:main,selene:network,supplementaries:network,strawgolem:main,patchouli:main,chisel:main,xreliquary:channel,structurescompass:network] rejected vanilla connections
18:58:15.400
net.minecraft.client.gui.screen.ConnectingScreen
main
Connecting to test.prisonfun.com, 25565
18:58:16.344
net.minecraftforge.fml.network.NetworkHooks
Netty Client IO #2
Connected to a vanilla server. Catching up missing behaviour.
18:58:16.352
net.minecraftforge.common.ForgeConfigSpec
Netty Client IO #2
Configuration file SimpleCommentedConfig:{balancing=SimpleCommentedConfig:{bit-bag-stack-size=512, enable-compatibility-mode=false, change-tracker-size=10, blacklist-random-ticking-blocks=false}, style=SimpleCommentedConfig:{bit-size=ONE_SIXTEENTH}} is not correct. Correcting
18:58:16.353
net.minecraftforge.common.ForgeConfigSpec
Netty Client IO #2
Incorrect key balancing.change-tracker-size was corrected from 10 to its default, 20.
18:58:16.475
net.minecraft.util.registry.WorldSettingsImport
Netty Client IO #2
Error adding element: Base value out of range: 256 [-10-128]
18:58:17.432
com.horriblenerd.cobblegenrandomizer.ForgeEventHandlers
main
Successfully loaded generators
18:58:17.639
com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService
main
Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
18:58:17.935
net.minecraft.client.network.play.ClientPlayNetHandler
main
Unknown custom packet identifier: badlion:mods
18:58:17.937
net.minecraft.client.network.play.ClientPlayNetHandler
main
Incomplete server tags, disconnecting. Missing: {minecraft:item=[forge:dusts/electrotine, forge:ingots/copper, chisel:concrete/lime, chisel:carpet/brown, chisel:red_sandstone, chisel:concrete/light_blue, create:toolboxes, projectred-core:illumars, create:valve_handles, chisel:wool/cyan, chisel:diorite, chisel:andesite, forge:ingots/silver, fairylights:dyeable, forge:gems/sapphire, projectred-core:illumars/pink, create:upright_on_belt, chisel:carpet/magenta, chisel:wool/orange, chisel:concrete/purple, projectred-core:illumars/orange, chisel:purpur, chisel:wool/blue, aquaculture:tooltip, chisel:mossy_cobblestone, fairylights:dyeable_lights, chisel:carpet/black, chisel:redstone, chisel:wool/brown, chisel:carpet/cyan, forge:fillet_knife, forge:ingots/tin, chisel:carpet/yellow, create:seats, chisel:planks/jungle, chisel:sandstone, projectred-core:illumars/lime, forge:ingots/electrotine_alloy, projectred-core:illumars/yellow, create:sandpaper, chisel:concrete/black, chisel:wool/yellow, projectred-core:illumars/light_gray, create:crushed_ores, projectred-core:illumars/red, projectred-transmission:insulated_wire, chisel:planks/spruce, chisel:end_stone, projectred-core:illumars/green, chisel:charcoal, chisel:planks/oak, chisel:concrete/yellow, chisel:concrete/cyan, chisel:wool/magenta, forge:ingots/red_alloy, chisel:carpet/red, aquaculture:turtle_edible, chisel:carpet/lime, chisel:wool/black, forge:rods/stone, chisel:futura, chisel:tyrian, chisel:concrete/light_gray, projectred-core:illumars/purple, chisel:metals/aluminum, fairylights:pennants, chisel:concrete/red, chisel:coal, chisel:carpet/purple, chisel:concrete/brown, chisel:metals/bronze, chisel:prismarine, chisel:wool/green, chisel:carpet/pink, projectred-core:illumars/cyan, projectred-core:illumars/white, aquaculture:fishing_line, chisel:limestone, chisel:wool/lime, projectred-core:illumars/magenta, projectred-transmission:framed_bundled_wire, chisel:concrete/gray, projectred-core:illumars/light_blue, projectred-core:illumars/brown, chisel:antiblock, forge:gems/ruby, chisel:wool/red, forge:gems/peridot, forge:fruits, chisel:concrete/blue, chisel:emerald, chisel:laboratory, fairylights:twinkling_lights, chisel:wool/purple, chisel:planks/birch, chiselsandbits:chisel, chisel:wool/pink, chisel:planks/acacia, chisel:concrete/orange, chisel:marble, fairylights:lights, chisel:carpet/light_gray, chisel:terracotta, projectred-core:illumars/gray, chisel:wool/gray, chisel:stone_bricks, chisel:quartz, aquaculture:tackle_box, chisel:cobblestone, chisel:carpet/light_blue, chisel:basalt, chisel:wool/white, chiselsandbits:bit_bag, occultism:elytra, projectred-core:illumars/blue, projectred-transmission:framed_insulated_wire, chisel:planks/dark_oak, chisel:carpet/orange, chisel:wool/light_gray, chisel:carpet/blue, projectred-transmission:bundled_wire, chisel:wool/light_blue, chisel:concrete/pink, projectred-core:illumars/black, create:create_ingots, chisel:bricks, aquaculture:bobber, chisel:carpet/green, chisel:concrete/white, chisel:carpet/white, chisel:concrete/magenta, chisel:glowstone, chisel:concrete/green, chisel:factory, chisel:carpet/gray, chisel:granite], minecraft:block=[chisel:concrete/lime, chisel:carpet/brown, chisel:red_sandstone, chisel:concrete/light_blue, create:toolboxes, forge:chests/gold, chisel:wool/cyan, create:valve_handles, forge:barrels/silver, chisel:diorite, chisel:andesite, chisel:carpet/magenta, chisel:wool/orange, chisel:concrete/purple, chisel:purpur, forge:barrels/gold, chisel:wool/blue, forge:barrels/copper, chisel:mossy_cobblestone, occultism:netherrack, chisel:carpet/black, chisel:redstone, chisel:wool/brown, chiselsandbits:chiselable/forced, chisel:carpet/cyan, chisel:carpet/yellow, create:seats, chisel:planks/jungle, chisel:sandstone, create:wrench_pickup, chisel:concrete/black, chisel:wool/yellow, forge:candles, chisel:planks/spruce, chisel:end_stone, chisel:charcoal, forge:chests/diamond, chisel:planks/oak, chisel:concrete/yellow, create:fan_heaters, chisel:concrete/cyan, chisel:wool/magenta, create:safe_nbt, darkerdepths:grimestone_replacement, chisel:carpet/red, chisel:wool/black, chisel:carpet/lime, chisel:futura, chisel:tyrian, chisel:concrete/light_gray, chisel:metals/aluminum, chisel:concrete/red, forge:barrels/diamond, chisel:coal, chisel:carpet/purple, chisel:concrete/brown, chisel:metals/bronze, chisel:wool/green, chisel:prismarine, chisel:carpet/pink, create:windowable, chisel:limestone, chisel:wool/lime, occultism:cave_wall_blocks, chisel:concrete/gray, create:windmill_sails, chisel:antiblock, forge:barrels/iron, chisel:wool/red, forge:chests/copper, create:fan_transparent, chisel:concrete/blue, chisel:emerald, forge:chests/silver, chisel:laboratory, chisel:wool/purple, forge:chests/iron, chisel:planks/birch, chisel:wool/pink, chisel:planks/acacia, chiselsandbits:chiselable/blocked, occultism:tree_soil, chisel:marble, chisel:concrete/orange, chisel:carpet/light_gray, chisel:terracotta, chisel:wool/gray, chisel:stone_bricks, forge:barrels/wooden, chisel:quartz, chisel:cobblestone, chisel:carpet/light_blue, chisel:wool/white, chisel:basalt, chisel:planks/dark_oak, chisel:wool/light_gray, create:brittle, chisel:carpet/orange, chisel:carpet/blue, chisel:wool/light_blue, chisel:concrete/pink, chisel:bricks, chisel:carpet/green, chisel:concrete/white, create:sails, chisel:carpet/white, chisel:concrete/magenta, chisel:glowstone, chisel:concrete/green, chisel:factory, chisel:carpet/gray, chisel:granite], minecraft:fluid=[decorative_blocks:thatch], minecraft:entity_type=[forge:zombies, forge:chicken, forge:pigs, forge:bats, occultism:wild_hunt, occultism:afrit_allies, forge:villagers, forge:parrots, forge:cows]}

I tried deleting both main Minecraft and the installation on Curseforge and copying the mods between the server and client.

Fixed
https://www.sportskeeda.com/minecraft/how-fix-minecraft-s-incomplete-set-tags-received-server-error#:~:text=Incomplete%20tags%20error%20(Image%20via,or%20they%20may%20be%20outdated. lied. I was booting up the server from the regular server launcher when I should have used the one with forge in it.