Maya: nParticles Rendering Problem [Solved]

We're in Maya 2022 now. I wanted to render an nParticle sequence - and Arnold did not render the particles. Yet again, the Maya AREA helped solve the problem.
The intro background photo, btw, was done with the insta360 one X2.
The music: "Computer Animation", composed and performed by me, Maximilian Schönherr
On Patreon you find me under /uhr24.
I offer a 12 part course about NURBS modeling from beginner to expert at udemy.com and skillshare.com