If it helps anyone, here’s the debug.log
5:30:18.250 : Starting log.
5:30:18.390 SDL : src/sdltiles.cpp:317: Failed to select render target: That operation is not supported
5:30:18.390 : initscr failed!
5:30:18.437 : Log shutdown.
EDIT: Never mind, I’ve got it. I just googled part of the error message and got a link to a similar thread from not long ago. For the record, just in case anyone googles up THIS post someday, the solution was to go to options.txt and enable software rendering. 