Putting this to beginners because I feel a bit stupid that it took so long to realize that the errors Access Denied errors might be a change of IP address. At some point perhaps the error message can tempt the simple solutions.
ERROR safe] safe-cli error: [Error] NetDataError - Failed to PUT Sequenced Append Only Data: CoreError(Data error -> Access denied - CoreError::DataError -> AccessDenied)
seems to be easily resolved with
safe auth login