Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Description: An unhandled exception occurred during t
the used query wasn't optimized for the amount of data. In our case we have purged unused data, but an better option should be optimizing the query or to have a look at the housekeeping. After the action we didn't receive the error anymore. Ofcourse it depends on the situation in which you receive this error and if this solution will help you out.