fill & sign not working

Hello all,

I have a protected form which is set to allow filling in and signing. I can open and fill and sign just fine on a pc but on my mobile device when I use Acrobat DC and I am signed in (or not) it gives me the following error. "This is a policy-protected PDF, which is not supported by the Fill & Sign tool. I have tested multiple forms and multiple phones. Same error. If I remove the password protection and leave the document wide open it works on the mobile just fine and you can fill and sign. Anyone have any suggestions? I really need to lock down these forms and send them to people to sign from their mobile device. Adobe chat suggested I try here. Thank you in advance!