DLL not found with standalone app but works fine in editor

I was able to fix this the missing condition by moving my DLL to -build game's path-/Managed directory

edit: I noticed that the dll was made for 64 bit, but my project set into x86
I changed it into x86_x64 then everything works fine

 

I am having this problem show up on 2021.3.5f1 unexpectedly. It worked just fine until it didn't - I'm not sure what changed (if anything - I did not change project or asset folder configuration). Moving the DLL's from the Plugins/x86_64 folder to the Plugins/Managed folder fixed it.

 

If the DLL from NuGet tries to download this unity package, by using this package you will able to download NuGet packages as a unity package and it will work correctly without any errors.

https://github.com/GlitchEnzo/NuGetForUnity/releases