Some updates install new features which require an updated license. If not the server will be disabled. Please get in touch with Dell/EMC for a new appropriate license file.    
My all networker backups are failing today onwards Log file has following info:-   98519:(pid 6816): Unable to setup direct save with server  Server is disabled: Update license required.153929:(pid 6816): The backup session could not start: Server is disabled: Update license required. 
backup failing today onwards