Volumeslider without function
JY-UQS10N4G-H  I need help please.
I have the radio and cannot function with the volume slider.
The volume does not react when I push sideways. the volume slider is important to me
and is an original app in the radio setup. All authorizations are granted. The slider is on.
Media is selected on the left.
What am I doing wrong ?
Best regards
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