Volumio 3.423 Appearance settings empty page on x86/64 version

I use Volumio 3.435

Today I wanted to change the background picture for Volumio screen, but the option zo do is is no more available. Is that a known bug/problem and what can I do to get this feature back?

BTW: A friend of mine has the same problem.

Greetings Ulli aka Tarkus

Volumio 3 Issues?

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