Hello masuk, I finally got my e-certificate by email after several phone calls and email correspondence with Dubai police. I took 8 calendar days from the moment i applied online. I had to re-send all my previous resident visas by email.
Elctronic verion of e-certificate can be easily verified and therefore there shouldnt be any issues if you upload it. I checked with other person on this forum who did that way, and PR was approved.
Good luck!