Certain Text Executions don't load completely and throw an Unexpected Error in the Tests webpanel.

Steps to Reproduce:

1. Create at least two Tests.
2. Create a Test Execution.
3. Add the created Tests to the Test Execution.
4. Do not execute the Tests (leave it with no status).
5. Navigate to the Test Execution view.
6. Add the Test Run Progress column to the Overall Execution Status table.

Expected Result:
Test Run Progress column is displayed correctly, even if no test has been executed.

Actual Result:
An Internal Server Error (500) is returned.

Note: As a workaround, hiding the Test Run Progress column prevents the error from occurring.