I see on the Player Unknown's Battlegrounds forum that BattlEye is used by that game. BattlEye sometimes blocks files. So, they have info up on their webpage under:
at this webpage:
https://www.battleye.com/support/faq/
There is a list of things to try there. However, at the end they say if BattlEye is blocking a legitimate file and it interferes with being able to play the game, to contact them, and then you can click on the here link, which leads to their Support link here:
https://www.battleye.com/support/
snlThirdParty150.bpl is a file that is normally part of Spybot and your file is located in the Spybot - Search & Destroy 2 folder where it normally is located, so I presume that's the legitimate file. So, if that were me I think I'd probably click the Here link to BattlEye's support and ask them about it. Please let me know how it goes.