If you played the lab and your "View Theory" button shows a blank screen or a "token expired" error, it could be due to a temporary glitch.
Not to worry, this can be fixed quite easily.
To resolve this issue, please try the following steps:
Try to run the lab from another browser (we currently support Google Chrome and Mozilla Firefox)
If the issue persists, restart the lab from the beginning.
Please do not hesitate to reach out to our support team if you have any questions or are in need of assistance.