When I go to print any barcode in the system the "Printing..." popup will appear and get stuck. Nothing prints from the printer.
This sounds like your Public IP address has changed or your local network settings have been altered.
Steps to Solution
Be sure you are on the same network as your Printer. Then please go to www.WhatIsMyIP.com and confirm the Public IP from that webpage matches the IP Address found under Printer Host Name in System Settings > Raw Printers > (double click on the printer in questions) > Printer Host Name.
If this does not solve your issue double check your Local Network Settings are correct and consult the Barcode Printer Setup article.