I had the same issue and solved this by adding: /usr/share/glib-2.0/schemas/gschemas.compiled mr, to my skype AppArmor profile.
If ever unsure about other permissions, issue grep -i denied /var/log/kernel.log as per the instructions on AppArmor's wiki.
e.g. adding /user/share/themes/** r, allowed skype to use GTK themes.
I had the same issue and solved this by adding: glib-2. 0/schemas/ gschemas. compiled mr,
/usr/share/
to my skype AppArmor profile.
If ever unsure about other permissions, issue
grep -i denied /var/log/kernel.log
as per the instructions on AppArmor's wiki.
e.g. adding themes/ ** r,
/user/share/
allowed skype to use GTK themes.