How to fix SilkTest Workbench tool Error "Failed to connect Open Agent" and "License check failed"?


Silk Test Sever Machine:

Silk Test Open Agent process is running in the background. But, Silk Test Workbench tool cannot be opened and shows below error on silk test server PC. 

Silk Test Client Machine: 

Silk Test Open Agent process not running in client PC, and shows below error "License check failed"

Can anyone help to fix the above errors?