Use the Test Server Administration window... to view the Errors displayed on the test server.
To view Error files:
The tab title changes to indicate the the highest level log recorded; Info, Errors, or Warnings.
The messages in the detail window are formatted as: TIMESTAMP-LEVEL:MESSAGE.
The Info/Warnings/Errors list shows the isolated Real-Time Logs Window related to the selected Test Server for quickly identifying its history and issues. Here are the matching Real-Time Logs for the above image: