Path to map Download in Android 10 OxygenOS version 10.3.5

Since the last update of my Android v10 OxygenOS version 10.3.5, my app can't save a file to the map Download.
In previous android versions, everything went well.
I get the error code 2103
I use the path /Download/myfilename

See here:

See: http://appinventor.mit.edu/ai2/ReleaseNotes