I was trying to play a mod in minecraft and i got this error saying

Uncaught exception in thread "main"
java.lang.RuntimeException: Error creating Mixin config additionalentityattributes.mixins.json for mod additionalentityattributes
    at net.fabricmc.loader.impl.launch.FabricMixinBootstrap.init(FabricMixinBootstrap.java:90)
    at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:148)
    at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:71)
    at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: org.spongepowered.asm.launch.MixinInitialisationError: Error initialising mixin config additionalentityattributes.mixins.json
    at org.spongepowered.asm.mixin.transformer.Config.create(Config.java:153)
    at org.spongepowered.asm.mixin.Mixins.createConfiguration(Mixins.java:100)
    at org.spongepowered.asm.mixin.Mixins.addConfiguration(Mixins.java:87)
    at net.fabricmc.loader.impl.launch.FabricMixinBootstrap.init(FabricMixinBootstrap.java:88)
    ... 3 more
Caused by: java.lang.IllegalArgumentException: The specified resource 'additionalentityattributes.mixins.json' was invalid or could not be read
    at org.spongepowered.asm.mixin.transformer.MixinConfig.create(MixinConfig.java:1290)
    at org.spongepowered.asm.mixin.transformer.Config.create(Config.java:148)
    ... 6 more
I don't know what is wrong if you could help me thanks alot 

I also a got a few warnings saying 

20:31:56.010

The mod "lank" contains invalid entries in its mod json: - Unsupported root entry "pack_format" at line 14 column 18

20:32:02.305

The mod "voidwalker" contains invalid entries in its mod json: - Unsupported root entry "pack_format" at line 14 column 18

20:32:02.375

The mod "wolveswitharmor" contains invalid entries in its mod json: - Unsupported root entry "artist" at line 15 column 11

20:32:02.545

The mod "witherborn_origins" contains invalid entries in its mod json: - Unsupported root entry "pack_format" at line 14 column 18

20:32:09.803

Mod `byg` (1.3.5.13) uses more dot-separated version components than SemVer allows; support for this is currently not guaranteed.

20:32:09.805

Mod `earthbounds` (1.0.5b) does not respect SemVer - comparison support is limited.

20:32:09.807

Mod `mavm` (1.0.7a) does not respect SemVer - comparison support is limited.

20:32:09.807

Mod `terrablender` (1.1.0.77) uses more dot-separated version components than SemVer allows; support for this is currently not guaranteed.

20:32:09.808

Mod `xaeroworldmap` (1.20.3.1) uses more dot-separated version components than SemVer allows; support for this is currently not guaranteed.

is there any way to fix these

Are you using Fabric? I'm not sure if this forum would be the right place then.