Cloud music app is a very unofficial thing - remember that you don´t pay for anything, and it seems this music comes pirated from China or so.
It is not in any way an official App promoted or supported by UBports.
That said, I don´t know but for any questions you need to reach out to the app developer, which you probably can find in the Openstore details. But I don´t think anyone here will be able to help you, since we don´t know the developer at all.
BR Florian