Define "instantly crash"
It will shut off without warning
When? When the display settings screen comes up? In the menu? While playing the game? While loading the game?
Define "no error log"
An error message did not pop up.
This sometimes happens to other people i know on Mythruna, not all of them
error log is not the same as an error message.
An error log is a file written to the disk. It looks like error-123424363476.log where the number is different each time. You will also see a client.log, mythruna.db, etc...
... but it's the error logs that I'm interested in.