So. You launch your course...and get an error message:
Oops! Page not found!
It looks like the file you were looking for is missing or has moved. If you feel you reached this message in error, please let us know at email@example.com
even worse...a blank screen
Some things to try to fix the issue.
1. Clear your browser cache and launch again.
2. Try launching in another browser.
3. If this is a Flash-based course, ensure that it's enabled. Please note that Chrome and Safari disable Flash by default. Details on how to enable Flash here
If you continue to have an issue we recommend contacting the course provider if you're a user.
If you're a content creator/owner, just send a message to firstname.lastname@example.org. We're happy to help!