Ugdhar

That is the vanilla server jar, you don't run that one. You should be running the forge jar.

That's not the latest version, try the real latest version 1.16.5-36.1.6 from https://files.minecraftforge.net/net/minecraftforge/forge/

Learn to use/like linux. It will probably run a million times better than Windows XP on a computer that old. And it is free which is right in your price range. Windows XP is dead, finding actual help for it will be hard if not impossible.

You sort of wrote yourself into a corner there..... But, truthfully, 1.7 is no longer supported due to being so old, only the current (1.16.x) and previous (1.15.x) versions are supported. You will need to update to a modern version to receive support.

Looks like you're trying to use OptiFine for 1.16.4 with 1.16.5 OptiFine is very specific about which versions of forge it works with. Try removing it and see if that helps, or read the OptiFine changelog for information on which versions work with which forge.

It is exactly that. Old forge versions work, but they are not supported. Just like if you decided you wanted to run Windows XP on your computer, you could make it work, sure, but if you ask Microsoft for help, they'll tell you that you need to get a newer version of Windows.

Fix the recipes the errors are about, the errors aren't about your sweet potato can

Never post code as screenshots, that is probably the #1 worst way to share it (maybe besides a video). Best way is to create a github, and post your project on there, then share a link here. If you're just sharing a small portion, copy & paste directly to your forum post inside code tags (the < > button at the top of the composition part of the screen)

It should be assets not asserts

Make a new topic, and post your own logs, your problem might not be the same even if you think it is.

Try removing Architectury

If you do not know some basic Java, you will want to do that first, or you will have a terrible time trying to make mods. Just sayin'. If you already do, or once you have, McJty has good tutorials to get your feet wet in the MC/Forge stuff: https://wiki.mcjty.eu/modding/index.php?title=YouTube-Tutorials

I myself cannot tell by the error which mod is causing the crash. You may have to add/remove mods little by little to narrow down the misbehaving one. I personally would start with this one: Since the author didn't even change the mod name or mod ID to something besides "examplemod". Anything that modifies the menus/world creation options and stuff could be the culprit as well, as it appears as though the error is being thrown from gui objects. Try removing those and seeing if it helps. Make sure if you post back here to post new logs! Good luck!

I believe the mappings take care of method and field names, but not parameter names. I thought I saw somewhere there was a project going on working to give them names, but I haven't got and more info on that.

But, did you install what wawla needs? Read the error again. Also, if it doesn't work, post new logs please

The answer is right there in the crash report

No prob, hope it helps, and I did find dimension files in twilight forest, they just ended up being in the generated folder, which I hadn't thought to check. Feel free to post back with any tips/info you find, in case others search the forums for this same/similar issue.

Yeah, but I'm willing to wager it is unfinished, considering there aren't any dimension jsons in there. *edit: Found them in the generated folder, so there are some there, my mistake. They're just not in the "right" place I would have expected.* (https://github.com/TeamTwilight/twilightforest/tree/1.16.x/src/generated/resources/data/twilightforest) Poking around, I see this mod that appears to have stuff done in the new way, but I haven't had a chance to dig into it yet: https://github.com/quek04/The-Undergarden/tree/1.16/src/main/resources/data/undergarden

This is because Twilight Forest, at least as far as curseforge is concerned, is not available for 1.16, so I'm guessing that whatever source you were looking at was either for an old version, or incomplete/in-progress. Sorry I don't have more help for you, I haven't messed with 1.16 that much, just started looking into it and tinkering with it. If I figure any dimension stuff out, or come across any decent references, I'll post back here for ya.

I think you mean subclass.

What have you tried? What is working/not working? I also know there are examples of this very thing if you search these forums, give it a go, you'll likely find your answer. And if it still doesn't work, post code, logs, and be verbose describing what is working/not working.

There does not appear to be a spoiler tag button in the forums editor anymore (it used to be a little eyeball button). Can this be put back? And at the very least, if not, how do you make one by hand? I don't get fancy with forum markup syntax, so I've got no clue.

Interesting, it used to be a little eyeball button at the top of where you edit a message, but it doesn't appear to be in the editor anymore. I guess you could try the quote or code tags, but I don't know if they collapse the same way spoiler does. Unfortunately I don't know how to add one inline by hand. Sounds like a good bug report for whoever works on the forums!

Before doing that, try as diesieben suggested and remove optifine, I didn't realize that was in there (one of the side effects of pasting your log directly into the post, too much scrolling down the page to catch everything).