Game crashes instantly upon clicking Login

Arch Linux

Steam version

Since the 1.0 patch, when I click Login on the game’s launcher screen, the game instantly crashes.

Since it’s impossible to start the game without Steam (because it asks for an ancient version of CURL that is not supported by the OS since ages), I’m unable to play at all, while my premium license days are ticking off.

The issue is magically fixed. No idea what fixed it.