nextcloud backup recovery and error, the file has not been decrypted

[Dataaja95]

hi
I'm trying to return to nextcloud from opnsense to make a configuration backup, but it seems that it is encrypted by default with the nextcloud password, which in this case is the application password, when I try to restore the Backup and determine that the file is encrypted, I put the password in the field reserved for it, I get the following error, do I have to decrypt the file first or how do I backup the refund in this case goes
    Warning, could not read file /tmp/phprV1GC9
    The uploaded file could not be decrypted.