[1.20.2][48.0.13] Problem with Mixin

[YisusArj]

Hello guys. First of all, thanks for any help. I have been blocked for few days with this problem and i don't find any solution online.

I'm new in minecraft modding. I'm developing a simple mod using a mixin (spongepowered). My main problem is that my mod works perfect in test environment (running ./gradlew runClient), but  when i add my mod in the mods minecraft  forge folder (after ./gradlew build), the game crash with the following log:

https://pastebin.com/8chydE9r

The log prints  "no refmap loaded" but in .jar the refmap.json file is generated whithout any problems.

My build.gradle looks like follows: 

https://pastebin.com/2xt9ujeQ

And my settings.gradle is:

https://pastebin.com/QxZcPVTq

My main .java is:

https://pastebin.com/aCXUKLDU

Thanks again for any help.