I frankly don't know anything about mods themselves or what should or should not be in the .json files. Hard to understand why the same mod works for me but not you though.
Please do a full **clean** re-install:
- move any valued save games elsewhere, and user_empire_designs.txt from /Documents/Paradox Interactive/Stellaris/ if you have made any custom empires or races.
- "uninstall" in Steam-Stellaris
- unsubscribe from ALL mods in the Steam workshop
- manually delete both the Steam/SteamApps/common/Stellaris AND Documents/Paradox/Stellaris folders
- re-install game in Steam, run a Steam Verify when done.
- add stellaris.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list.
In particular you need to make sure there are no files or folders left under either the Steam Stellaris or Documents Stellaris locations,...
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