I made a backup with verification=false and this worked.
Then deleted the duplicati-verification.json File in mega.nz (mega.nz GUI) and then made a backup with verification=true and this stuck again!
Added some data to the source folder and started again with verification=false worked.
Uploading file (125,28 KB) ...
Uploading file (1,26 KB) ...
Uploading file (1,73 MB) ...
No remote filesets were deleted
Compacting not required
Checking remote backup ...
Listing remote folder ...
Verifying remote backup ...
Remote backup verification completed
Downloading file (1,73 MB) ...
Downloading file (13,36 KB) ...
Downloading file (14,92 MB) ...
Duration of backup: 00:04:32
Remote files: 6217
Remote size: 45,15 GB
Files added: 1
Files deleted: 0
Files changed: 0
Data uploaded: 1,86 MB
Data downloaded: 16,67 MB
Backup completed successfully!
Tried again with verification=true => stuck.
The mega-account has space left (about 4GB free) and also the transfer limit is not reached (gui says 16,7MB transfer used, that is nothing, after adding the file transfer is 33,4MB which also is nothing).
Wired problem because I have the exact same problem with 4 mega.nz accounts and 3 other mega.nz work and the 4 worked about 7 months without problems and some days ago all 4 stopped working. No change in the configuration or something else?!?