With the Reframe360XL plugin applied to my 360 video clip, the viewer just shows a solid white image while playback is paused. It only shows the reframed video while playing, although there are also occasional white flashes now and then. This, understandably, makes the plugin less than usable.
Screen recording
DaVinci Resolve 18.0.1 build 3
Reframe360XL v1.0.Mac.beta (9b98794)
macOS 12.4, M1 Pro CPU