Paint_Ninja

This is the Forge forums, we do not support Fabric here.

Please share your debug.log, as explained in the FAQ

Your crash report doesn't contain any sensitive personal information, it's fine to share

You need to update your drivers, as explained in the FAQ

This flag tells Java to perform the reference counting procedure of G1 garbage collection in parallel. If you have a lot of cpu threads (at least 12) and allocated a lot of ram, adding this flag can help scan through all that allocated ram faster. However, it may hurt performance if you don't have many threads as it'll cause thread contention, where it starts fighting with the game for cpu resources. The FAQ has some advice on performance iirc.

Your post was automatically hidden by the anti-spam, please share a link to your crash report or log on paste.ee, as explained in the FAQ.

This is the Forge forums, we don't support Fabric here.

1.12.2 requires Java 8

Please be aware that disabling IPv6 may increase your ping time (therefore more lag) and prevent you from joining some servers. Disabling it should be a last resort because of this. Instead, you should fix the root cause of the issue such as a bad DNS, firewall blocking one direction, outdated networking drivers, etc...

You need to follow the driver update guide in the FAQ. Checking for updates through usual ways won't work when they're in a broken state.

Contact the server owner and ask them to whitelist the non-cheat mods that you want

https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/#comment-541436:~:text=How do I update my drivers%3F

Your post was automatically hidden by the anti-spam, please share a link to your crash report or log on paste.ee, as explained in the FAQ and What to do if your thread is automatically hidden

Your post was automatically hidden by the anti-spam, please share a link to your crash report or log on paste.ee, as explained in the FAQ and What to do if your thread is automatically hidden

Your post was automatically hidden by the anti-spam, please share a link to your crash report or log on paste.ee, as explained in the FAQ and What to do if your thread is automatically hidden

Please follow the driver update guide on the FAQ and make sure you're using 64bit Java. Checking for driver updates with device manager or similar will not work. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/#comment-541436:~:text=How do I update my drivers%3F Exit code 1 means the game crashed. Please do not dump crash reports directly in the post as it sometimes triggers the anti-spam and makes it hard to read on mobile. Please share a link to it on https://paste.ee as explained in the FAQ

Your post was automatically hidden by the anti-spam, please share a link to your crash report or log on paste.ee, as explained in the FAQ and What to do if your thread is automatically hidden

Contact Arclight for support - they seem to be the ones causing the compatibility issue.

Fabric is not supported on the Forge forums as it is a separate thing

Update GML (groovymodloader) by matyrobbrt

Your post was automatically hidden by the anti-spam software, please share a *link* to your crash report or log on https://paste.ee to avoid this.

Your log doesn't seem to have any errors, do you have a crash report you could share instead?

That config file is corrupt - delete it

Please don't spam posts on your thread. If you want immediate help, ask on the Discord instead.

You have been awarded a "Superhelper" role as a thank you for consistently providing great help to the community, which should reduce and remove various restrictions that normal members have in order to combat spam. There shouldn't be any cooldowns for you, so I'll look into this issue and try resolving it. I intend on eventually automating the awarding of this role to active members but it's pretty tedious to setup properly.