Why does "tag not supported" keep popping up on my LG4?

[AC Question]

The text comes up in a little floating window. Possibly something to do with Facebook? However, it comes up seemingly randomly; not when I've tagged someone.
Thanks

 

[mhinc]

"Tag Not Supported" is an NFC error. I am guessing you have NFC enabled. And you may have your phone near a debit or credit card with a CHIP in it, which would explain the Random timing of this happening. If the NFC tried to read that chip it will give that error.
If you want to prevent it to just turn off NFC.

 

[Mlkfisher]

I keep getting tag not supported message popping up all thetime plz say y