Crash in character selection

Hi, since yesterday I've been experiencing constant crashes during character selection.

I get a message that says:

vk::Device::acquireNextImageKHR: ErrorDeviceLost

This is the first crash I've had in the entire league. I already tried reverting to an earlier driver version, but the problem persists. The same thing happens when I switch to DirectX 12. The game crashes constantly after I get past the login screen.