ToneMap settings greyed out, encoding with ToneMap enabled fails

[Selur]

Okay, that helped:

Vapoursynth plugins path:
Disabled Vapoursynth sind no plugins path could be found.
  -> detected no Vapoursynth,..

Okay, Hybrid disables it since no vsPluginsPath is found.
So question is where vapoursynth is installed on your system.

What Vapoursynth verison did you install R57 or an older version?
Also what plugins did you install? (searching for a plugin should show where the plugins path is on your system)