I completed the first Heretek mission and got the loading screen before the briefing, then nothing. The loading screen just stays there, I have background sound and the cog is still spinning but even leaving it for a while I still come back to a loading screen.

I've seen posts on the steam forums for the game from September with this issue but no fixes and nothing here. Any help would be appreciated otherwise I'm just going to have to skip all the Heretek missions.