error 500 is display in a wen page when stack ticket are requested from inserter or import station
The 500 Internal Server Error is a very general HTTP status code that means something has gone wrong on the web site's server but the server could not be more specific on what the exact problem
The first thing to check is the network: are all network segment active
Access: can the different part of the network be ping
Another possible issue is the absence of one (or a few) of the ressources needed to produce the stack ticket.
Some of those ressources are loaded only when the service are started (or restarted). This mean that even if everything was working the day before, some of those might have been missing for a while. The description of the error message should contain the name of the missing ressource.
UPDATED: November 29, 2017