Screen capture not displayed in oneplus 3

[AC Question]

I TOOK SCREEN SHOT BY PRESSING POWER & VOLUME BUTTON. WHEN I WANT TO SEE THIS, IT SAYS " Oops, SORRY, THIS TYPE OF DOCUMENT IS NOT SUPPORTED FOR VIEWING"

 

[speedlever]

Are you looking for it in the gallery?

 

[mchockeyvette27]

I TOOK SCREEN SHOT BY PRESSING POWER & VOLUME BUTTON. WHEN I WANT TO SEE THIS, IT SAYS " Oops, SORRY, THIS TYPE OF DOCUMENT IS NOT SUPPORTED FOR VIEWING"

Did it actually take a screenshot or does it not take it at all? I know banking apps and certain secure/private apps don't let you take screenshots.

Does the message look similar to this?: