We are also having this problem here on 4.24.1 - We have set all effects being referenced to be CPU sim although not ideal for performance and have set fixed bounds to true. We have made sure Niagara is correctly added to the Build.cs Module Dependencies but alas still have this crash on launch of built version of the game. This is getting really costly in terms of our developement time and is stopping us from progressing on the PFX front. Any help past what has been mentioned above would be amazing! I’ve posted an image of our crash even though its identical to the one above.
