Unable to log into SEPM console

For the past few days I am not able to log into SEPM version 12 RU2 console. The logging into Management Server console hangs forever.

I opened a case with Symantec and did the following troubleshooting steps:

1. Restarted SEPM services

2. Rebooted SEPM server

3. Ran SymHelp tool

4. Ran FINEST logging and sent over logs for both SEPMs

5. Tried to log into SEPM using web console, but that didn't work

This problem happened suddenly and I have no idea why. Symantec Engineers are still troubleshooting. Can you give some ideas?