I then enabled debugging and found that I got a lot of similar errors:We are currently experiencing technical difficulties. We will try to fix the problem as soon as possible. Sorry for the inconvenience.
These all contain:Notice: Undefined index: pdf in /homepages/.../modules/Printing/action.default.php on line 33
So it is obviously a problem with PDF and the printing module, but I wasn't able to find any information about this issue or a PDF module.$params["pdf"]
Any help would be greatly appreciated.

