lol, next one 
To make it short: try installing the latest visual c++ redist packs from Microsoft, you can find them here >> Latest supported Visual C++ Redistributable downloads | Microsoft Learn
The ones under “Latest Microsoft Visual C++ Redistributable Version”, where it says “The latest version is 14.40.33810.0”
For a longer version and some details have a look at this post/thread over here >> Pattern preview doesn't work in Reaper - #17 by unmodern
btw I got Nektarine as well and couldn’t run Playbeat in it either. In fact Playbeat didn’t run anywhere anymore lol. But installing those packs (both versions, x86 and x64) solved it for me.