The error message is pretty explicit:
"The attempt to connect to the report server failed.
Check your connection information and that the report server is a compatible version."
It even tells you what you have to do!
So read the message, look at your connection strings, look at the versions, and see what is happening.
Sorry, but we cannot do any of that for you: we don't have access to your systems, much less the code you are using to access them!