We have 2 web servers , 2 app in our prod environment. Suddenly after server reboot activity, on one of the server we are facing issue "Error registering the viewer with service". When request hit to one of the server then only user see error. We are using File Storage for the implementation. I suspect some settings or configurations might have changed in one server. What all things can we check for this ? Trace log show below error in affected server:
"Make sure you are using CacheStorage inside single-instance application deployment only."