A user of the Windows release of Octave 6.3 reported that they couldn’t start the GUI (bug #61017).
The GUI also didn’t start when using a nightly build from octave.space that was built using the release branch of MXE Octave. It started correctly for them with a nightly build that was built using the default branch of MXE Octave.
They tried replacing the Qt libraries in the released version with the Qt libraries from the version that worked for them. That made the GUI work for them in that “patched” version.
IIUC, that probably means that there is a bug in Qt 5.14 (used in the released version) that has since been fixed upstream.
Would it be ok to update Qt on the release branch of MXE Octave from version 5.14.2 to version 5.15.2 (which is the current version on the default branch)?
If that is ok, could we also repackage Octave 6.3 for Windows with the updated version of Qt?