www.makemkv.com

MakeMKV closed with fatal error. Couldn't find a log file in the MakeMKV directory or in Users.
Version 1.8.10. I'm sure there is one somewhere.

Pacific Rim 3D original disk. Chose only 7.1 DTS-MA, 3D movie and forced English subtitles.

What is my next move?

kws

'View/Preferences/General/Log Debug Messages'

Then try again.

If that doesn't achieve anything:
/onlinehelp/testdump.html

You could try a back-up, or you could try NOT choosing 3D and see if it works.

There are plenty of things to try. I guess it's up to you.