When I tried to launch Fabric it created a crash report.
I'm using the Fabric API and the Randomly Adding Anything mod.(https://www.curseforge.com/minecraft/mc-mods/randomly-adding-anything)
This might be the mod's fault but I'm new to Fabric so I'm not sure.

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 12/22/19 8:53 AM
Description: Initializing game

java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors!
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:55)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke(EntrypointUtils.java:34)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointClient.start(EntrypointClient.java:33)
at net.minecraft.class_310.method_1503(class_310.java)
at net.minecraft.class_310.method_1514(class_310.java:394)
at net.minecraft.client.main.Main.main(Main.java:155)
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:497)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:193)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:138)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)
Suppressed: java.lang.NoClassDefFoundError: net/fabricmc/fabric/impl/client/render/ColorProviderRegistryImpl
at io.github.vampirestudios.raa.RandomlyAddingAnythingClient.lambda$onInitializeClient$25(RandomlyAddingAnythingClient.java:155)
at io.github.vampirestudios.raa.RandomlyAddingAnythingClient$$Lambda$1583/1570072137.accept(Unknown Source)
at java.lang.Iterable.forEach(Iterable.java:75)
at io.github.vampirestudios.raa.RandomlyAddingAnythingClient.onInitializeClient(RandomlyAddingAnythingClient.java:150)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointClient$$Lambda$1536/554901638.accept(Unknown Source)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:48)
... 12 more
Caused by: java.lang.ClassNotFoundException: net.fabricmc.fabric.impl.client.render.ColorProviderRegistryImpl
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:161)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 18 more

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

-- Head --
Thread: Client thread
Stacktrace:
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:55)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke(EntrypointUtils.java:34)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointClient.start(EntrypointClient.java:33)
at net.minecraft.class_310.method_1503(class_310.java)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.class_310.method_1514(class_310.java:394)
at net.minecraft.client.main.Main.main(Main.java:155)
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:497)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:193)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:138)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

-- System Details --
Details:
Minecraft Version: 1.14.4
Minecraft Version ID: 1.14.4
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1642579856 bytes (1566 MB) / 1912602624 bytes (1824 MB) up to 2147483648 bytes (2048 MB)
CPUs: 4
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
artifice: Artifice 0.3.5
autoconfig1: Auto Config v1 1.2.0+mc1.14.4
cloth-config2: Cloth Config v2 0.5.2
fabric: Fabric API 0.4.2+build.246-1.14
fabric-api-base: Fabric API Base 0.1.2+28f8190f42
fabric-biomes-v1: Fabric Biomes (v1) 0.1.1+28f8190f42
fabric-commands-v0: Fabric Commands (v0) 0.1.2+28f8190f42
fabric-containers-v0: Fabric Containers (v0) 0.1.3+28f8190f42
fabric-content-registries-v0: Fabric Content Registries (v0) 0.1.2+28f8190f42
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+28f8190f42
fabric-dimensions-v1: fabric-dimensions-v1 0.1.1+28f8190f42
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.1.2+28f8190f42
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.1.1+28f8190f42
fabric-item-groups-v0: Fabric Item Groups (v0) 0.1.1+28f8190f42
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.1.1+933c24c242
fabric-loot-tables-v1: Fabric Loot Tables (v1) 0.1.1+28f8190f42
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.1+28f8190f42
fabric-models-v0: Fabric Models (v0) 0.1.0+933c24c242
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.1+28f8190f42
fabric-networking-v0: Fabric Networking (v0) 0.1.4+28f8190f42
fabric-object-builders-v0: Fabric Object Builders (v0) 0.1.2+28f8190f42
fabric-particles-v1: fabric-particles-v1 0.1.1+933c24c242
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.2.3+28f8190f42
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.1.1+933c24c242
fabric-renderer-indigo: Fabric Renderer - Indigo 0.1.14+28f8190f42
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.2+28f8190f42
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.3+28f8190f42
fabric-rendering-v0: Fabric Rendering (v0) 0.1.2+28f8190f42
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.1.4+28f8190f42
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 0.1.3+d423005742
fabric-textures-v0: Fabric Textures (v0) 0.1.4+933c24c242
fabricloader: Fabric Loader 0.7.2+build.175
jankson: Jankson 1.0.0+j1.1.2
minecraft: Minecraft 1.14.4
raa: Randomly Adding Anything 1.3.0+build.340
Launched Version: fabric-loader-0.7.2+build.175-1.14.4
LWJGL: 3.2.2 build 10
OpenGL: NO CONTEXT
GL Caps:
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fabric'
Type: Client (map_client.txt)
Resource Packs: ERROR NullPointerException: null
Current Language: ERROR NullPointerException: null
CPU:

This is likely the fault of RandomlyAddingAnything, which seems to be trying to access the ColorProviderRegistryImpl class directly. Fabric API is almost definitely not responsible.

K thx.