Custom Print Service - URL Error when adding to Web App Builder Print Widget

[ChadTinsley]

I used the export web map tool in ArcGIS Desktop to publish a geoprocessing print service. It published without any errors and I can go to the url (Task: Export Web Map ) and everything looks normal. However when I add the task url to the print service widget I get an error stating, "the url is not available". I have another custom print service from the same serer that currently functions in an existing web app, but I get that same error if I try to add it to a new one.

Anyone out there have this issue before. I'm running server and desktop at version 10.6 (just recently upgraded server).

Thanks, Chad

[RobertScheitlin__GISP]

Chad,

   WAB 2.7 allowed me to add your url to the Print widget settings without error and then I even printed using your service as you can see in the attached pdf...