Backups failing on Ubuntu 18.04

Getting this error message when trying to backup Ubuntu 18.04:

I kind of remember when setting up the backup option, it downloaded software/patch, then errored on the install…Maybe???

Error processing remote manifest ( GPG Failed, see log below:
===== Begin GnuPG log =====
gpg: WARNING: “–no-use-agent” is an obsolete option – it has no effect
gpg: AES256 encrypted data
gpg: encrypted with 1 passphrase
gpg: decryption failed: Bad session key
===== End GnuPG log =====