Issue Backup error message gives curl command that will fail

[kirsteng]

My hosting service provides Plesk
I have been backing up to an Azure App Service FTPS

Backups have started to fail with an error message like

Error: Unable to operate the storage: Transport error: unable to delete directory: Curl error: (67) Login denied: The last FTP request: PASS *****: The last FTP response: 530 User cannot log in
Check if you have permissions to delete folders from the storage. You can check it independently with the commands:
And some curl commands

The first curl command works
The second gives

< 550 The directory is not empty.
* QUOT string not accepted: RMD test-dir

If I delete the file I am then able to use the curl command to remove the directory

I am wondering if something has changed in Azure to prevent non empty directories from being deleteable , and could that be why my backups have started failing.

 

[kirsteng]

I got an error trying to make this post if I included the curl commands.
They are
curl --ftp-create-dirs -v --ftp-pasv --ssl -k -u myuser\$myuser ftp://myserver.ftp.azurewebsites.windows.net/data/backup/test-dir/
curl -v --ftp-pasv --ssl -k -u myuser\$myuserbackup ftp://myserver.ftp.azurewebsites.windows.net/data/backup/ -Q "-RMD test-dir"