Problem has already been seen. See https://www.gimp-forum.net/Thread-Gimp-C...On-Startup
Several things to try. If they all fail try installing a different build. They mention "Gimp portable" but a build from Partha.com would work just as well (use a 2.8 build, the 2.9 available there are still development versions).
Several things to try. If they all fail try installing a different build. They mention "Gimp portable" but a build from Partha.com would work just as well (use a 2.8 build, the 2.9 available there are still development versions).