If you are using this “wannabe” build in file manager (Memory & USB):
Install Amaze (from f-droid) and try installing the apks via Amaze!
There is a similar but german Topic
If you are using this “wannabe” build in file manager (Memory & USB):
Install Amaze (from f-droid) and try installing the apks via Amaze!
There is a similar but german Topic