The commit 0.4.15-dev-3086-g236649c reintroduced the problem that is described in
CORE-13931 "FamiTracker 0.4.6 from rapps has invisible about-dlg"
But it reintroduces this problem only when ros is run with theming. Try it with the Lunar theme!
in 0.4.15-dev-3086-g236649c with Lunar theme, the about dialog is invisible
The classic mode does still work fine in 0.4.15-dev-3086-g236649c!
It should properly draw the about dialog in both: unthemed and with Lunar theme, like it was still possible with 0.4.15-dev-3085-g515e0cf