KVM in manager returning a black screen for 2016 SSD 1 vps

I need to use the KVM on my 2016 SSD 1 VPS but all I get in the manager is a black screen. I tried on chrome and firefox on two different computers, tried going through the API but all I get is the black screen.

Actually, all it took was a reboot of the vps to get the KVM to start working again… posting this in case anyone else gets this issue!