I believe that since code freeze started (or maybe 1.7.55) a random behavior was introduced related to these 2 messages:
err:winediag:nulldrv_CreateWindow Application tried to create a window, but no driver could be loaded. err:winediag:nulldrv_CreateWindow The explorer process failed to start.
Sometimes together there is also: err:ole:apartment_createwindowifneeded CreateWindow failed with error 0
I'm not seeing this alone. at November 23 there was a mention to it in bug https://bugs.winehq.org/show_bug.cgi?id=39384 and also in December 1 there was a mention at bug https://bugs.winehq.org/show_bug.cgi?id=39057
The issue seems to manifest more when the computer is heavily loaded (cpu/ram).
I believe a regression test to be very hard since the issue is random, sorry.
Is anyone else affected by this? I'm still affected with today's git.
Best wishes, Bruno