The problem is, there should be a split window, it probably prints error messages but the place where those go are hidden in the collapsed lower part. Can you please try to pull it out of the lower thing? The mouse cursor should change to imply there is a grabber
I installed three free plugins, and it does work fine.
But the Show Stems Pro is still not displayed under View. It is installed, I see it under Preferences > Add-ons > Plugins, together with the three plugins I just have installed. Maybe I have to install Show Stems Pro once again …?
There is something in, but I don’t know if there’s a connenction:
could not get ShowVerticalBeam from saved preferences
could not get AngledVBeam from saved preferences
could not get measureOverlaps from saved preferences
could not get showOffPathMeasures from saved preferences
G2.6.2 [1231] macOS 10.13.6 – Having issues with error notices from several plugins, and after removing each of the problem ones, finally down to this in the Macro Panel:
could not get ShowVerticalBeam from saved preferences
Apparently something in Glyphs from 2018 that has popped up again.