Iprint Appliance 3.1 and Chromebook

I have installed the chromebook extension. When I try to add a printer, it will just say Micro Focus IPrint installing printer. Nothing else happens other than the percent going to 100% and repeating. I can install the printer on a windows pc with no problems. I do not have a SSL because it is a .local domain. Is there some setting on the chromebook that needs to be changed? The chromebooks are managed in a school.

Thanks

Paul