Hi,
First Check your Internet Connectivity. If that is not a problem try the below option, which helps you do create queries without Crush.
Step 1 : In Report Builder Add-in Select "Options" button
Step 2 : Turn on Offline Mode by Selecting below highlighted Option.
Step 3 : Create your queries.
Step 4 : After Creating All queries, Refresh All Data blocks.
Hope this will helps you..!
Regards
Ashok