Grabbed the most recent version off curse (3.6.6.1) and it's got this in the mcmod.info file.

[
{
"modid": "examplemod",
"name": "Example Mod",
"description": "Example placeholder mod.",
"version": "3.6.6.1",
"mcversion": "1.12.1",
"url": "",
"updateUrl": "",
"authorList": ["ExampleDude"],
"credits": "The Forge and FML guys, for making this example",
"logoFile": "",
"screenshots": [],
"dependencies": []
}
]

Is it just an old version of the file, or is something breaking in your gradle? (I see the local GIT version is fine)

**edit: as such, I can't open the config options for the mod itself. :(

I was aware of it. and I release a new version (3.6.6.2 for 1.12.X) that has this fixed. And it's one file for all 1.12 versions again.