The mod(s) has two distinct issues. At first attempted start up it gave two errors. Manifest.json file not found and after fixing that, I got wrong id error. When you extract the zip file, you get a double nested file setup. That is: Mods/[mod name]/[mod name]. What you need is: Mods/[mod name] or the game will fail to recognize it, it cannot find the manifest.json file if you get a double nested file. You can fix this, or make sure to warn the downloaders about this issue.

The second issue, being id doesn't match the file error. That is a simple fix. Just chance the id field in the manifest.json file to match the name of the file you downloaded. In this case that means that right as you download the mod you get, in the id field: tweaks-plus-plus> But what the game needs is for that id field to match the name of the file itself. So in this case that should be: tweaks-plus-plus-1.0.1>. The same goes for your gameplay mod. Make sure you change that small tiny error. Or the game cannot recognize the manifest.json file.

Vineykmine wrote:

The mod(s) has two distinct issues. At first attempted start up it gave two errors. Manifest.json file not found and after fixing that, I got wrong id error. When you extract the zip file, you get a double nested file setup. That is: Mods/[mod name]/[mod name]. What you need is: Mods/[mod name] or the game will fail to recognize it, it cannot find the manifest.json file if you get a double nested file. You can fix this, or make sure to warn the downloaders about this issue.

The second issue, being id doesn't match the file error. That is a simple fix. Just chance the id field in the manifest.json file to match the name of the file you downloaded. In this case that means that right as you download the mod you get, in the id field: tweaks-plus-plus> But what the game needs is for that id field to match the name of the file itself. So in this case that should be: tweaks-plus-plus-1.0.1>. The same goes for your gameplay mod. Make sure you change that small tiny error. Or the game cannot recognize the manifest.json file.

I have nether of the problems i tried download and add this and loaded my main save fine and no errors. So i don't know how you get the errors.
Might be corrupted download or try remove folder completely and add new one again.

As I said, it has already been fixed for me. I just manually changed the ID field inside the Manifest.json file. And I already manually moved the mod name file conflict. So I don't need an explanation on how to fix it. I am just stating issues I had during installing.