you mentioned, you are using an Android 11 device for your tests, which one?
yes, I'm aware of that, but it looks like I forgot to delete it from the Download folder before starting the test...which means, copying to /Download works for me now...
however copying to /Documents still fails
I would like to invite others to test, too... what do you get?
here is the apk file to download https://drive.google.com/file/d/1a98oQiPNIoYijpkjLpkc48jwu0iR8e9X/view?usp=sharing
Taifun