The error occurs when the Database you are in has received an error whilst communicating with the services responsible for storing the Crystal Report documents.
The first thing to try is to close and reopen the Financials tab.
In the Financials tab title, click the vertical three dots icon and select Close.
To re-open Financials, in the top left, click the nine dots icon and select Financials.
If this has not resolved the issue, our support team will need to investigate, run scripts or liaise with the hosting or development teams. Any Issues with contacting us, please see the following Get support in Access Financials.