Hello SKarthik,

You should check the file "LicenseLog.xml" in the folder
"C:\Program Files (x86)\Siemens\WinCC\diagnose" on the
WinCC-PC.
And you can check, if the licenses are OK, in the
Automation License Manager.
If a license is corrupt, you can contact the Authorization-
Hotline for "repairing" the license.

If you can not find a corrupt license, it can happen, that
the WinCC-license-service has crashed.

In this case, you should use the SIMATIC Assessment Suite -
Data Collector (SAS-DC) - formerly known as SIMATIC
Diagnostics Tool (SDT) - to collect diagnostics and system
information from the Computers.

https://support.industry.siemens.com/cs/ww/en/view/65976201

Then create a Service Request, and send the data to the
Technical Support of Siemens.

Regards

Georg Berghof