Cannot access CUPS utilities after upgrade to Lion Since upgrading to Lion, I cannot access any of the local functions in the CUPS web-based interface. The response I get is "Internal Server Error".

For example:

http://localhost:631/admin or http://localhost:631/jobs/

The printers are all working fine, but I can't access job queues, etc.

Any ideas?
Enter the following at a Terminal command prompt:

cupsctl WebInterface=Yes


You will be able to access the CUPS web interface thereafter.