BDRS server stopped backing up

BDRS server stopped backing up

I am on free Tier license, and up till today the server was backing up fine. I only have 7 VMs I back up every other day. Today I woke up to this error message about not enough licenses.
"BDRS free backup failing and showing this error "Error 102049: Backup failed because not enough license units are available (or trial period has expired). To continue backup, purchase the required licenses and allot to the server from the registered portal account."

I have also attached screenshot; any help will be greatly appreciated.