The "SkendPow" effect also doesn't support WebGPU. You'll need to disable WebGPU and go back to using WebGL only for such effects.
Construct has supported WebGPU for a couple of years now, just disabled by default until now, so there's been plenty of time for addon developers to provide a WebGPU port. I'm afraid this type of thing is one of the risks of using unmaintained third-party addons.