Hi Mansour, thanks for bringing this issue to our attention. Check out this related post and see if it helps: Issue with Data Source (PostGreSQL)

In Dave’s case, it was a proxy issue:

Once we disabled it, everything went back to normal We had set that proxy because of the limited # of simultaneous connections we could have

Please double check:

1. Your proxies


2. On the DataSource details page, confirm(and double check) all the IP Addresses are allowed/trusted to access the database?

Thanks!