The Security Analytics sensor and a provider may not be communicating. Determining whether network traffic is being exchanged or what is being exchanged may be needed. tcpdump is a good tool used extensively by the networking world.
Another cause for login failure is when using LDAP user credentials on the sensor do not match the LDAP server. There are methods to check for the cause.
The firewall was changed during the upgrade but the process is the same for all in and outbound traffic through eth0, aka bond0.
The system password may have been changed on the LDAP server.
Once the traffic makes it from the Security Analytics system to the provider, then most services work as expected. It will take more investigation to determine if the username and password combination are correct or if there are other restrictions. There are tools like ethereal on a desktop which are very good to interpret the data or you can import the pcap directly into the SA sensor.
You can check for LDAP server access or authentication failures by running grep -i ldap /var/log/messages, after logging in as root to the command line using ssh. Does the system return "Invalid credentials"? If so, set the system user password in Settings -> Authentication.