Could a third-party application cause the BABOON error in Destiny 2?

Yes, certain third-party applications can interfere with Destiny 2 and potentially cause the BABOON error. This includes overlays from programs like Discord, NVIDIA GeForce Experience, or other system utilities. Try disabling these applications one by one to see if that resolves the issue. Antivirus software can sometimes also cause problems, so temporarily disabling it for testing may be helpful (but remember to re-enable it afterward).