Paint_Ninja

Alternatively, update to the latest Forge for 1.20.1, which supports Java 22

Turn off any ad blockers or similar - they often break the adfocus site

It is difficult to modify compiled code unless you already have a lot of experience with it. You should look for the source code, such as on a github repo, as this will be easier to read and understand (it may have code comments, won't be obfuscated names, and won't have decompilation artifacts)

It sounds like a build setup issue. Are you reobfuscating the built jar like the MDK does? Have you made sure the access transformer file is named exactly as the MDK has it, in the exact place it expects (case sensitive as well)?

Please share a link to your crash report on https://paste.ee, as explained in the FAQ

Please share a link to your crash report on https://paste.ee, as explained in the FAQ

This is the Forge forums - we don't support Fabric here. Read the FAQ

Please share a link to your crash report on https://paste.ee, as explained in the FAQ

Please tell us the fully qualified name of EventHandler to help us understand what you're referring to. For example, SubscribeEvent's fully qualified name is: "net.minecraftforge.eventbus.api.SubscribeEvent" If EventHandler it doesn't start with "net.minecraftforge", it's likely not a part of Forge.

You revived an 8 month old thread to say that you're having problems with Fabric... on the Forge forums. Read the FAQ before posting.

Probably the bclib mod

Mod "mcdw" is broken

Fixed in Forge 49.0.49

CurseForge and Forge are separate things. Forge loads the mods, CurseForge is a mod download website. Forge 49.0.48 has a known bug with the non-Forge mods.toml detection. To fix this, either the mod authors need to set a valid loaderVersion (e.g. "*" to allow everything, or "[49,)" for 1.20.4+) or you need to temporarily downgrade to 49.0.44 until I release a new version of Forge that has this bug fixed.

Read the error - it tells you how to fix it "Current Java is 1.8.0_271 but we require at least 17" You need Java 17, you're currently using Java 8

What MC version? What's the IP? Are any mods needed to be able to join?

If you have nvidia graphics, don't touch your amd drivers, otherwise it might fix it but keep running on integrated graphics, which will result in terrible performance. For nvidia graphics, you need to tell windows and nvidia control panel that anything Minecraft related (the launcher, java, etc...) should prefer high performance graphics so that it actually uses your nvidia gpu

If you have nvidia graphics, it's important that you make sure Minecraft (and anything Minecraft-related) is set to prefer high performance graphics first. If you only update your AMD drivers it might fix the issue but cause severe performance loss vs Vanilla as it'll be running on the integrated graphics instead of dedicated nvidia graphics

This is a known bug with Forge 49.0.45. Should be fixed in the upcoming 49.0.49 release. Use 49.0.44 or older in the meantime. If the issue persists, make sure you're downloading the Forge version of the mod. Click the files tab on curseforge and filter by modloader so that you're not downloading the wrong one.

Please share a link to your crash report on https://paste.ee, as explained in the FAQ

Go to the resourcepacks screen in the game and disable the "Programmer Art" resources

Please share a link to your debug.log on https://paste.ee, as explained in the FAQ

If you have nvidia graphics and getting this error, chances are the drivers are broken and it's falling back to integrated graphics instead. To fix this, you should change the settings in windows and nvidia control panel to force minecraft to prefer high performance graphics, so that it runs on your dedicated nvidia graphics instead of integrated.

This is the Forge forums. We only support Forge here. Read the FAQ

Please share a link to your crash report on https://paste.ee, as explained in the FAQ