Most tittle say everything:

latest.log

I tried to use this mod to see if i see better perfomance, but after changing oldversion of "MixinBooter" and deleting "VanillCreamFix" the game don't even open. Directly crash issue.

Never rename your files like that, you must keep original ordering. MixinBooter needs to go first.

I will check if that the cause.

latest.log

The problem keep goin, even removed all renaming mods

In case i don't get an answer i will make another issue again.

nvm, after doing some test. The latest version of Mixinbooter for some reason is incompatible with the latest version of Lootr.
After Downgroading the Lootr to 2 versions back, the game opened normally.

Even the latest is around 2+ years old now, send your crash log.

Even the latest is around 2+ years old now, send your crash log.

I wanted to re-created the issue updating the mod (Lootr), but for some weirdo reason the game launched normally today. This is really weird to be honest. But thats it iguess.

Thanks for helping me, and... to discover about to don't renaming mods. I will never do that again on future, since i made modpacks for people.

There is only one issue i found, which is strange, on the server side we added loliasm with vintagefix i see a problem with Dragon Mounts 2, whistles stop working (they work making you to order the dragon actions). Have to mention the server is cracked because a friend needed.

After removing the mod loliasm and vintagefix from the server side the whistles started to run again normally.

I can try to provide a log from the server but it would be more in the night. Since im out of my pc.