If this is happening and it is the first time using this machine for Pantry Printing, there may have been a problem downloading the QZ Tray application. This most often happens when the browser tries to download a 32 or 64 bit version of QZ Tray when the OS is of a conflicting type. Try deleting QZ Tray and downloading again. If this is the issue, the user may have to close the browser completely after the reinstall before trying again. 

If the application had been working previously, and this is a new problem, restarting the QZ Tray application may be all that is needed. Restart the application by right-clicking the green printer icon in the system tray and clicking Reload (shown above) will allow the browser to talk to the application again. After doing this, remember to close the browser completely before trying again.

In some cases, clearing your browsers cookies/cache may also help alleivate issues experienced while printing. Note that you will have to re-authenticate into the system and re-generate a token for printing (by clicking the "Pantry Print" menu option) after clearing your browsers cache/cookies. You can clear your browser cache/cookies by following the steps below:

If you're using the Google Chrome browser:

Either type “chrome://settings/” in chrome’s address bar or click on the three dots in the top right corner of the browser and click “Settings”

Enter “clear browsing data” into the search bar and click on  the “Clear browsing data” option that appears.

On the dialog that pops up, switch to the “Advanced” tab and make sure you select the “All time” Time range and have the “Cookies and other site data” and “Cached images and files” option checked. Finally, click “Clear data”.

If you're using the Mozilla FireFox browser:

Click “History” in your browsers menu bar and then “Clear Recent History…”

Make sure “Everything” is selected in the “Time range to clear” drop-down, and that “Cookies” and “Cache” is selected under the “History” section of the dialog. After making those selections, clicking “Clear Now” will clear the cookies and cache.