Ugdhar

It appears to be using Fabric, as this is the Forge forums, you would probably get better results asking wherever fabric support is given. Based on your story, I would guess world corruption, I'd try loading a backup.

I split your reply to a year old post into a separate support post. It's best to do it this way and not just reply to someone that looks like they have the same problem Please read the FAQ and post logs as described there, it will help you get assistance.

These are the Minecraft Forge forums, and you are using Fabric. You would probably get better results asking for help wherever Fabric support is given. I also moved your post to the support forum, as Modder Support is for programmers creating Forge mods.

Please read the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/) and post logs as described there, they may contain clues as to what is going wrong.

I moved your post to the support forum, as this is a request for support. Please read the FAQ, and post logs as described there. It will provide more information that will help people help you.

Post logs as described in the FAQ, they may contain information that would help.

Please read the FAQ (link in orange bar at top of page), and post logs as described there.

Share logs/errors, and someone may know how to help. Make sure to read the FAQ on sharing logs.

Did you read their curseforge page? https://www.curseforge.com/minecraft/mc-mods/citadel Looks like there are instructions for how to do it there.

Read the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/) as directed at the top of the page, it tells you how to install Java there.

I split your reply to an unrelated topic into a separate request for help. Please read the FAQ for how to properly request help and post logs.

Always post a new log after you have tried something and it doesn't work. Saying "same thing" does not help anyone help you.

Please read the FAQ for how to properly post logs. Also, this is a fabric log, not a forge log, you would probably get better results posting where fabric support is given.

You should be able to browse the available classes within net.minecraftforge.client.event through your IDE. You can also look on github at https://github.com/MinecraftForge/MinecraftForge/tree/1.21.x/src/main/java/net/minecraftforge/client/event

This is a fabric log, not a forge log. You would probably have better results asking for support where fabric support is given.

No need to bump your post in less than 2 hours. If someone sees it that can help, they will reply. If you're looking for a chat room style help, go to the forge discord. Also, if you read the FAQ as the forum instructs you to do, and post logs as directed, that increases your chancea of getting help. I would go and do that first.

Please read the FAQ and post a complete log as described there

Please read the FAQ and post logs as described there.

Please read the FAQ (https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/) for how to properly share logs. The error above indicates that you need to allocate more memory to your game instance.

You would have better results asking a more specific question. What have you done? What exactly do you need help with? Please also read the FAQ regarding posting logs.

The latest log was taken down by pastebin for some reason. Did you try removing the mods you added? The mods you updated, was there a specific reason you updated, or just because? It's possible the updates introduced incompatibilitie, or even need a newer build of forge. If you didn't need the updates for a specific reason, you could also try downgrading those mods.

Please read the FAQ, and post logs as described there. https://forums.minecraftforge.net/topic/125488-rules-and-frequently-asked-questions-faq/

You likely either need to install java, or run jarfix. The FAQ can tell you how to install java. If you already have it, you can get jarfix from https://johann.loefflmann.net/downloads/jarfix.exe

Please read the FAQ and post logs as decribed, along with a description of your problem . When you have an issue, create a new thread (I split your reply into a separate thread), don't hijack someone else's thread.

Try updating your video drivers. Get them from the manufacturer website, don't use windows to update them.