Ugdhar

This is an ancient thread, you should read the FAQ, and make a new post, posting logs as described to an external site, and linking to it in your post.

These are the Minecraft Forge forums, you should probably ask for Fabric support wherever they give Fabric support for best results. (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/ very first item listed there)

Post a new log after removing that mod, may point to the true culprit, or be a completely different error entirely.

GitHubException in thread "main" java.lang.RuntimeException: ja...Context Unable to enter the game Crash Report https://mclo.gs/k5areKjFound this doing a google search for "ClassNotFoundException: com.simibubi.create.foundation.utility.Lang", it was the first result.

Read the FAQ (orange banner at top of page) and post full logs as described there to an external site, and provide the link here.

These are the forge forums, you would need to ask wherever neoforged support is given.

Please read the FAQ (orange banner at top of page) and post logs as described there using an external site such as https://mclo.gs and post the link here.

Please read the FAQ (orange banner at top of page), and post full logs as described there using an external site such as https://mclo.gs It is very possible there is information in the log that could point to the problem, that is why posting the entire log and not 1 line is most useful.

Remove entity_model_features_1.20.1-forge-3.0.1.jar from your mods folder. If there are other mods that depend on that mod, you may have to remove them also.

Cracked launchers are not supported.

That failure is common in both logs you posted, if you remove the entity_model_features does that change things?

Just browsing through I see this Does it work if you remove that mod and try?

Always post new logs (as directed by the FAQ, do not post logs directly into your message as they become long and difficult to read) when you remove a mod or try something different. Chances are you probably have other client-side mods there, try searching the log for "Failure message", and trying what it suggests.

The error log suggests removing player animations, did you try that? Usually client side mods like that cannot run on a dedicated server. Also, please read the FAQ (banner at top of page) with regards ro sharing logs.