In my case, the Schedule A form, after filled and signed on PDF, I couldn't upload it online. I get error that the file cannot be uploaded. So, after reading the posts here, I decided to download a new fresh version, and re-enter all the details from scratch. Then, I clicked validate at the end. Now, finally, I could see the flag "Validated Yes" on the top-right. Initially it was always "Validated NO". I think the file I was using was corrupted or it had a problem.
Now, all is good. I am now waiting for the next step after I uploaded the police certificate and Schedule A.
Tarek