Ugdhar

Do not download mods from wherever you got that from, there is no such thing as pixelmon for 1.15.2. You should ONLY ever download mods from curseforge.com (or through the twitch client mentioned below) Websites that host mods illegally will repack them with incorrect version numbers, host outdated versions, and sometimes even put viruses/spyware in them. If you'd like to find more information on this, why it's bad, and what websites to avoid, visit https://stopmodreposts.org/. My advice for an 8 year old would be to get the twitch launcher from https://www.twitch.tv/downloads and use that. Makes it MUCH less likely you will get tampered with mods, and much easier to get mods.

Also, side note, you should not use mom as a modid if you plan on releasing your mod, it's too short.

Could you give details? Likely solution is probably either running it from the command line, or running Jarfix

Yes, and if it doesn't work, post a screenshot of that window again.

Edit what area? Where it says "Enter Command"? If it says that as soon as the window opens up, someone just customized the cmd prompt to say that. Provided that is the case, then it's not important, ignore it. BUT You are typing, at the very least, 2 separate commands into that commandline, using quotes where you shouldn't. The first is executing the installer jar, with the default java, and the second, well, more than likely being passed as an ignored parameter to the first command. Do not type the path/name of the forge jar file unless it is after -jar And don't use quotes.

The problem is that you are executing the jar with that first command. Delete the whole first part of what you have there, and get rid of the quotes *edit: I was thinking that "enter command" was part of your command prompt, or did you actually type that?

Which command? Copy/paste the text in the command window (if you right-click I believe there's an option to "Mark", then enter copies) and paste it here. Or a screenshot if it's just 1 screen or less of stuff would work.

What are you trying? What happens when you try? Please be as detailed as you can, "it doesn't work" doesn't give us anything to go on to help you.

Data generators are now built-in: https://wiki.mcjty.eu/modding/index.php?title=Tut14_Ep7 there are more generators in the net.minecraftforge.client.model.generators package

It should be debug.log but I'll take latest.log if that's all you have

As far as I know, nope. And if you are registering your biome, you should have an instance of it somewhere, if not, make one.

Please post your debug.log, and if you can your project as a github repository. Simply adding that walls.json would not cause all that stuff to happen, so there's definitely something else at play here.

There is no guarantee to registration order, except Blocks are first, Items second. Add the feature to your biome in the FMLCommonSetupEvent and not in your biomes constructor. I am just guessing at this, since you only shared bits and pieces of code.

What version is this for? Also, you should post your project as a github repository, it makes it much easier to see the big picture.

You need to use RenderTypeLookup.setRenderLayer on your blocks in your FMLClientSetupEvent, probably with RenderType.getCutout()

You need to run the build gradle task

Please also post the full debug.log

Do you have a duplicate key somewhere?

Your mods.toml is missing loaderVersion, that's what this means: I would open up the one that comes with the MDK and go over it again to make sure yours has all of the mandatory fields.

How did you set your project up? It would be useful if you hosted your project on github, then you could share the link here, and people would be able to see the big picture, and probably help you better. I see this: and this I guess if it were me, I would double check that my mods.toml was correct, and make sure my main mod class was correct. If you don't make a github, I'd say at the very least post the contents of those 2 things.

Please post new logs, and post the debug.log, not the crashlog.

Please post a log from your troubles with 1.15.2, since the other versions you mentioned are no longer supported. Also if you're getting to the early loading screen, it would appear you've made it past using the installer, so this would be a different issue. I myself have had no issues running any of the jar installers, and most of the issues I see regarding them are people with hijacked jar file associations, or missing/wrong version of Java.

It looks like you have an invalid configuration somewhere. You can either try to fix it, or delete your config folder if you haven't made any changes to it. Or rename it if you don't like deleting things. It should be recreated on next launch.

Please post the debug.log from the logs folder in your game folder. This should give enough information to start figuring out what is going wrong.