Closing as it's fixed for you. I haven't been able to repro this issue. Feel free to reopen if it happens again in the future.
Status changed to Fixed
I'm unable to access any of the sandbox-mode apps I'm in the Administrator role for. Opening the canvas page results in a redirect to https://www.facebook.com/4oh4.php .
Deleting and re-adding me to the Administrators role doesn't fix it.
Steps to Reproduce:
Log in as me.
Attempt to access any of the listed applications' canvas page.