Forge Mods

Please post complete logs as described in the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/), it will contain more information that may help figure out what your problem is.  

These are the Forge forums, you'd probably be better off asking in a fabric forum, if they have one.

I've just created a server for my friends and I to play on, running 1.21.4 with Fabric. I've given them an instance that includes all the client side mods they'll need, but I've just now come across a problem, built into the nature of MacOS, that a specific client side mod fixes. If possible I want to use this mod as a server side mod, so my friends wont have to go through the hassle of adding it themselves. The mod in question is MacOS Input Fixes. The latest version (1.21.3) does work on 1.21.4. If this can be turned into a server side mod, what would I need to do to change its functionality? What programs would I need to install and learn?

when i start my save i have this error message  [Server thread/WARN]:Could not find value 'formations:template_editor' in registry 'minecraft:item' for @RegistryEntryAcceptor! What can i do ??

Great news! That actually fixed it! I am forever grateful for your help man, you seriously saved me. Here is exactly what I did in case others have the same issue: Create new world (using the re-create world function didn't work for me.) Use the same seed from original world, make sure my game settings are all the same like difficulty, gamemode, etc. Load in to world. Exit world. Go to save folder, copy level.dat, level.dat_old, and session.lock Go to original broken world's save folder, delete those three files and paste in the ones I copied. Load into original world. I relogged a few times just to check the error wouldn't return. Seems now to be working just fine! I'll be making sure to make more frequent backups and if this problem ever occurs again, I'll try out your solution once more. Thank you again TileEntity!