Ugdhar

If you're just running java programs, you only need the JRE. If you can't open jar files after installing Java 8, it's probably messed up file associations. Can't tell for sure without seeing a log or error message.

Also, make sure you are running the forge jar, hard to tell since your commandline says "server0.jar". I would advise against renaming the forge jar to some arbitrary name.

I do not believe your issue has to do with the warning about advanced terminal features, rather I think it may be due to using Java 16. Try it using Java 8, which is the version MC uses, although I think I saw something somewhere saying forge works with up to Java 15.

Not wrong, just not finished. Until you create a class with the Mod annotation, there is no mod, and it does not build your src/package/directory structure for you. Without those things, there is nothing to build. My suggestion would be start with checking out the examplemod src and seeing how it is set up, and making it run.

There's nothing to build if you don't have/have not created any sources. You have to create a mod in java before you can build it. Extract the MDK and copy everything you copied, plus the src folder, and don't edit out the examplemod stuff out, and you will be able to build the example mod without writing your own code.

Sure give it a try

Try deleting C:\Users\cleme\AppData\Roaming\.minecraft\config\fml.toml and see if that helps, looks like it's crashing trying to read that file

3 hours is not very long in forums time to wait for an answer. If you're looking for (possibly) quicker help, you should go to the forge discord, it's an actual chat style setup as opposed to forums posting, and you might get a quicker reply.

All depends on personal preference. What's better, apples or oranges?

Fairly sure this is related to the post highlighted in the red bar across the top of the forums, I believe the URL for the maven repo changed, or something like that. And more or less, any version below 1.15 is no longer supported. (although I believe they made all the final versions of the old stuff work, despite still being unsupported. The aforementioned red bar post at the top of the forums says which versions were fixed)

Where is this method? I cannot find a class called player anywhere, and PlayerEntity only seems to have teleportTo, teleportWithTicket, and randomTeleport methods. Thanks!

Just a heads up, forums by nature aren't instant help, typically people come, look, post if they have time/can help, and move on to other things, checking back later. If you're looking for a more conversation-like help experience, I would suggest hitting up one of the support channels in the forge discord.

Then you will probably have to remove one or more mods to stay within the memory you have allocated.

Please post the full log

Looks like you're running out of memory, based on that crashlog. Give the game more memory (i.e. -Xmx2G) That latest.log doesn't show any crash that I can see. Also, on a second look, looks like you're running a 32-bit Windows XP. That could potentially be troublesome for you, as I'm fairly sure 32 bit Windows only supports ~ 3G of system RAM total.

Post logs from client, and server if possible. Do installed mods on client/server all match version #s and stuff?

Please start a new thread, and post logs to show what's actually going on.

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)