Potential workaround and downgrade instructions in this thread:
https://forum.glyphsapp.com/t/edit-window-error-in-1310/14243?u=mekkablue
Closing this thread as it is off-topic here.
Potential workaround and downgrade instructions in this thread:
https://forum.glyphsapp.com/t/edit-window-error-in-1310/14243?u=mekkablue
Closing this thread as it is off-topic here.