Ugdhar

Post logs as described in the FAQ, more information is needed to help you with tour issue. I moved your commwnt into its own topic, you shouldn't add on to someone elses post with what is essentially a "me too".

You should post full logs to show the big picture. Does it work without Optifine?

You never said what your problem is. Also, post logs. See the FAQ banner link at the top of the page for how to do so. *edit: And of course I'm not seeing the FAQ link at the top, so here it is: And no idea what this AMD spam crap is

You should post your log on a paste site per the FAQ (link in banner at top of page), it's near impossible to read the way you have it posted with all the sideways scrolling needed.

You have Java 8, you need Java 21 for the version you are trying to run.

Just to make sure, did you update your video drivers from the AMD website? That's where you want to get your graphics updates from if not. That error in the logs just looks very weird to me

Yes, then create separate Installations in the launcher so you can specify different folders for each set of mods/versions you want to run

Try posting logs per the FAQ banner at the top of the page, it might provide information that would help figure out what is going wrong. I split your comment into a new topic, because even though you said it's "the same problem" as the original poster, you have a different setup than that person, it's not the same problem.

Unfortunately those screenshots do not provide any useful information. Try to post logs per the FAQ banner link at the top of the page, they may have information that would show what is going wrong.

That log still has both embeddium and rubidium Also not sure if "reforgium" would count as a dupe of those mods as well.

Is it the same error? Or something different? If it's something different, then the dupe mod problem is that, and you've got other issues. When making a large modpack, it's always best to add mods a few at a time, and test in between, rather than add 100 mods and then try to figure out what's incompatible/breaking.

Post logs as described in the FAQ (banner link at top of page), it might have some information that will show what's happening

Good rule of thumb, is not to use fancy/special characters in file or folder names. It has a history of breaking stuff

I don't think you can use embeddium and rubidium at the same time, if you remove one does it still give dupe mod error? *edit: also, thanks for fixing the log post, much easier when you can view it in raw format!

This log is so hard to read with the line wrapping. See the FAQ for the proper way to post logs.

Very first search result on google when I search for "minecraft jinryuujrmcore": https://www.curseforge.com/minecraft/mc-mods/jingames-jrmcore

You will need to upload your logs somewhere on the internet, and link to them here. The links you have provided (file://) are for files on your local filesystem, which we cannot access. The FAQ link at the top of the page has information on paste sites you can use to share your logs.

Also, Optifine only works with specific versions of Forge. The optifine downloads page shows which version of forge it is compatible with. In your case, you are using OptiFine_1.20.1_HD_U_I6 which is for Forge 47.2.18, but you are using forge-1.20.1-47.3.1, and I imagine this could potentially be an issue as well.

Try moving your server to a folder that is not OneDrive, see if that helps.

So first suggestion, don't use whatever text box you used to format your forum post, it ends up being hard to read. In regards to capes, I do not believe forge provides any support for making capes, as that is reserved for Mojang/Microsoft special stuff. If I'm wrong, I'm sure someone will chime in and let us know.

Click the Show All Versions button at the bottom, then point at the little i next to Installer, and click the Direct Download link.

Click the Show All Versions button, point at the little i after Installer, and try the Direct Download link.

You would probably have better luck asking on a Fabric forum, not Forge, but you might get lucky and find someone that uses Fabric also.

You shouldn't be extracting the mod .jar, just place it in your mods folder.