Hey there @AlpineBrisket !
Thanks for reaching out!
Have you also experienced Countdown loading and providing an empty arena with no hostiles as OP has provided?
If so, could you please attempt the troubleshooting steps provided by UbiMassilia above and potentially provide us with a video if possible?
Regarding the linked threads, one of our Ubi-Peeps should be back in touch on those as soon as possible with further information ...