Try this:
1. Playback file using SVP menu: Open file via mpv...
if it can't help
2. Rewrite environment variables using SVP menu: Utilities > Set environment variables for Vapoursynth...
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Your mpv is not from SVP bundle.
SVP's mpv: ...VideoPlayer: mpv v0.41.0-dirty /via 'C:\Users\Andrey\AppData\Local\Temp/mpvSockets/13420'
Your mpv: ...VideoPlayer: mpv v0.37.0-522-ga56d8ff1 /via 'C:/Users/cmsre/AppData/Local/Temp/smplayer-mpv-39e0'
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And this warning:
[W]: Playback [cd926636]: Frame server (64-bit) NOT FOUNDIt is not normal.