This problem has appear on 15.1.0.25 If you find 15.1.0.23 - all OK But have a problem with color grading (unstable from frame to frame, flickering and so one)
15.1.0.025 seems to have solved the Resolve launching problem for everyone. Could you please make sure you are on that build and send us logs if that doesn't work either.
Rohit Singhal DaVinci Resolve Software Development Blackmagic Design