That won't be easy to test because I don't have access to the server, I only have email errors.
I'll ask someone to run from the command-line, but I don't think prince is the issue because when running local works. That is why I am wondering if someone else had the same issue.
The full message we have is : A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
We have a dashboard with devexpress controls which we use prince to print it on PDF. As I said, it was working properly before load balancing and also works fine running local... very weird.
I think you will need to talk to the developer or server admin to see exactly what is happening, whether any error messages are showing up in the log, whether the log is being generated at all, whether Prince has been installed correctly and can be run from the command-line.