When I build my project (Windows standalone) and run it on my PC, everything works fine. However, on some other PCs, a native plugin (which I wrote) used in the project fails to load with the message: Fallback handler could not load library [Path to build directory]/[ProjectName]_Data/Mono/[Plugin Name].dll However, this "Mono" directory under the data folder doesn't exist, and the plugin and its dependencies are in the [Project Name]_Data/Plugins/x86_64 directory as always. I believe this issue is the same as described in https://forum.unity.com/threads/missing-mono-folder-in-build.923210/. I have already tried a clean checkout, rebuilding the library, and reinstalling Unity. It still works on some PCs but not others (and on PCs where it fails, it fails across all user accounts and it fails consistently every single time the application is run). This was with Unity 2020.3.23f1. I also tried upgrading the Unity version to 2021.3.16f1. The same problem occurs, except that instead of [ProjectName]_Data/Mono it looks for the plugin in [ProjectName]_Data/MonoBleedingEdge, which also does not exist. Has anyone experienced this problem before or know what causes it? Earlier versions of this project worked as expected on the PCs in question and it is unclear to me where to start looking for the change that broke it.