Empty or invalid response received from server

This is caused by corruption of the Post-Processing data for one of the cases that are active.
Rerun Post-Processing in all cases.
1. Complete a full node backup (Clearwell Utility option 1) using the following options:
a. Do you like log files to be backed up? (y, n) choose n
b. Would you like to include case backups? (y, n) choose n
2. Upon completion of the backup, do not restart services.
Start Clearwell Services? (y/n) choose n
3. Navigate to D:\CW\Vxx\ and open a command prompt (replace XX with the appropriate version number)
4. Run this command:
b admin-client diagnostics idxPostProcessingForAllCases
5. When the command finishes, start all services (Clearwell Utility option 4).
NOTE: This issue has been observed in a Distributed Architecture (DA) environment with users who have access to a lot of cases. If a customer is using eDP 10.2.6, contact Support to obtain the patch or upgrade to eDP 10.2.7. If the problem persists, further investigation may be needed.
After some time, the loading will stop and a popup message will be displayed (see error section below). Clicking OK removes the popup but the Active Cases are never shown.