Thread:Extension talk:Collection/Instant Error message

Hi there,

when I start the render server on the same machine as the Wiki, the Collection Extension works just fine and I get proper PDF files. But because our Wiki is just for the intranet use, the server is very small and if someone tries to generate a large book, the Wiki is very slow while the PDF is being fetched and rendered. Because of that I wanted to render the files on an external server and created a little Ubuntu Server just for that. So I installed everything and changed the server in my LocalSettings.php. After that I wanted to generate a little book of two pages and clicked on Save as PDF. After I clicked on Save as PDF, I instantly got this error message:

Can someone tell me what I did wrong this time? I did everything just as the first time, with the only difference, that the render server is a seperate machine now.

Any help would be appreciated.