Probably it is related to the Trusted Mode Valve introduced with one of the updates for CS:GO.

https://support.steampowered.com/kb_art ... -KLXV-0292

Hi, I have the same problem with Action! and CS:GO. When I click F9 to start recording the game instantly shut down. I am using the latest version 4.13.1 bought from steam. In the past I used ShadowPlay to record my games including CS:GO but after one of the updates ShadowPlay has stopped working so...