[2021] I can't no longer play 1.2 with mods.

So... 1.3 came out, but right now I'm on a 200~ hours save so I really wanted to continue that before going into 1.3 and Ideology.

Anyways, I try setting the game version to 1.2. Everything seemed good but I can't activate my mods.

Rimworld detects that those mods are downloaded and installed. So after I activate them all, of course the game restarts itself. But, when restarting mods still deactivated.

On the Rimworld Discord some guy suggested I use RimPy, but that didn't work. Any help with this...?