Sage Line 500 - Error accessing SQL Backend Connection Broken Unexpectedly

When using Sage Line 500, users will receive the error Connection to the backend has broken unexpectedly.

1. This error is sporadic among users. Not everyone gets the error at the same time, although there are times when it does affect multiple users and can occur just once, or for up to 15 minutes at a time. When it is a longer time frame is when more users get the error at the same time.
2. When the issue happens, we can duplicate the issue directly on the Sql Server, so it is not a network problem outside this system.
3. The error occurs only when opening a window in Sage. For example, opening User Management, Stock Enquiry, Bin to Bin Transfer, etc. Any grey window that opens from the main menu to perform a query or insert/update data.
4. It does not happen consistently at any one time or on any one day.

We have noticed when...