I have tried to setup Duplicati using a Tab Digital Nextcloud Server account and WebDAV.
When attempting to run a Backup, I receive the following error which aborts the backup:
'Error getting response stream (ReadDoneAsync2): ReceiveFailure'
I’ve been unable to fix this myself. In searching, I found this post which indicates it might be a Mono plugin throwing an error.
To test if it might be Mono and not Tab Digital, have installed Duplicity and the same backup completes without any problems.
I would rather use Duplicati but I have been unable to find a solution for the ReadDoneAsync2 error.