If I switch from summary to select main test case I see an error dialogue before it loads.
1- Click ‘Test Cases’ to view a list of test cases
2- For 1 of the test case rows click the right side arrow to open the summary view beside the list of test cases
3- Click the name of a test case in the list of test cases
4- Observe error dialogue 'An error occurred during the last operation or your installation is currently in maintenance mode. Please try again or refresh the current page’
5- Error dialogue disappears
6- Main view for selected test case loads