Printing Errors or Lights & Stuck Print Jobs

I'm really excited to use this printer and all it's functionality (need to scan receipts in particular). I've have it set up to the wifi network, I've downloaded the HP app, and all systems appear to be a go. IE: the wifi connection light is on and not flashing, my computer recognizes the printer, I've run all the test reports and nothing looks amiss. The printer shows as connected and online. I'm also able to print the test reports from my computer, so there is obviously some communication going on between the computer and printer. HOWEVER, as soon as I try to print something, it looks like it it is working, but then I get an error message with no other details. Same thing for scannning. I can scan the receipt, but then I can't send the scanned image back to my computer (using the email setting). I've redone the wireless wizard a few times, restarted my computer, reentered the printer's IP address, all to no avail. So frustrating. help??? I so want to use this thing. Oh... and I need it desperately for work. I'm a remote worker, so I don't have IT support on site and I also bought this printer myself... so they don't support it anyway. Many, many thanks in advance!!!