We got following error message after installing plug on one of the CRM Server
The description for Event ID 18960 from source MSCRMKeyService cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
the message resource is present but the message is not found in the string/message table
This error comes if you have importing plug in steps (i.e. import xml) using plug in registration tool
Manually create the plug in steps and then restart CRM website (i.e. iisreset) and also restart CRM asynchronous service.