how can i resolve this issue CRRRW7611W ??

This warning message is a timeout that occurs on the DNG server, usually because a) The query being executed is too complicated, or b) there may be issues with network latency, system resource limitations (i.e. RAM, CPU, etc.), DB latency, or slow disk performance, that could be preventing the server from running queries efficiently. Considering that you mentioned you're using a cloud server, I would be tempted to suspect network latency. 

In order to collect more information about possible environmental issues, I would suggest adding the Performance Health Check widget to your personal or project dashboard, and see what kind of results are reported. If anything from this report shows up in the "red", then you should contact your system administrator to resolve these issues.

Hope this helps,

Mike