Have you verified the Composer service is running on your vCenter server? Anything in the Event Viewer related to Composer?
I restarted the service and verrified i saw it in task manager.
Still the same vague error.
Thanks for the help egg
Under the Security Events i found, An account failed to log on.
So i went back and reentered all of the information.
I had not full entered domain\user into the username.
A silly mistake on my part cost me too much time.
Thanks for your help
in my case I used a domain user account named virtualadmin
I assigned all the permissions in Virtual Center to that account and used that account to add the VC to my Connection server but when I enabled View composer I was getting that message so what I did was to add virtualadmin account as local admin in my VC