Wan2gp plugin unusable

I have a 5090 gpu and 128 gb of ram, and I still cant get this plugin to do more than 10 seconds clips if I am lucky.
It constantly freezes midway.
I just tried a 5 mb video file that is 720p and 20 seconds long, but even at 2x upscale it freezes and demands 250 gb of ram if I try the 4x upscale .
Is something wrong with the plugin?  There is no reason I cannot handle this on my pc.