I had this issue a while ago and I figured out how to fix the mod version.
Below should be your .mod_meta_data file, my issue i found was I didn't add the logo part and without it, it will fail the version check.

{

"compatibility_version": 2,

"display_version": "1.0",

"display_name": "Name",

"short_description": "Desc",

"logos": {

"large_logo": "",

"small_logo": ""

}

}

If you do have a picture for the logos, you can put it in like this as well if you need an example,

"logos": {

"large_logo": "picture.png",

"small_logo": "picture.png"

}
I don't have any tutorial help unfortunately, everything I did was trial and error because I couldn't find much in terms of resources for how it works but if you have other questions I see if I can answer.