As per the above-mentioned description, you are receiving message about restore when opening a pdf, is that correct?
Could you please let us know if you are using Acrobat Reader to open pdf files?
What is the Android OS version and Acrobat Reader version installed on your phone?
You may refer to this link for the same: Acrobat Reader Help for Android: Troubleshooting FAQs
Please find attached screenshots showing the adobe reader version and android version on my phone.
Adobe version: 188.8.131.52813
Troubleshooting FAQs don't help me unfortunately, have already gone through those.
I'd be glad if you could help me as I can not open most of the pdf attachmentus in my emails due to this problem. Instead, I keep coming up with this screen (i had attached in my previous message).
Thanks for the info.
Could you please launch Acrobat Reader app on your phone and open any pdf in there, does this message still appears?