What is this Error? This Document Might Contain Unsafe Content On Whatsapp

What is this Error? This Document Might Contain Unsafe Content On Whatsapp

Hello guys and welcome back to my youtube channel “Theta box”. Today I try to access the one pdf file via my whatsapp messenger application, but unfortunately it shows the one notification message and the message is “This document might contain unsafe content. Make sure you trust the sender before you open it”. So what