Further update. I discovered that if I changed the destibnation folder name it worked, hoever it then did a full backup, not an incremental one.
As I mentioned, this started happening out of the blue so it is not that I can't remember the previously entered encryption key....
Further update. I discovered that if I changed the destibnation folder name it worked, hoever it then did a full backup, not an incremental one.
As I mentioned, this started happening out of the blue so it is not that I can't remember the previously entered encryption key....