Unable to load DLL 'sqlite.interop.dll': the specified module could not be found. (Exception from HRESULT: 0x8007007e)

The error message is pretty explicit: the DLL assembly file "SQLite.Interop.dll" can't be found, so it can't be loaded and your application fails.

At a guess - and that's all it can be, we can't see your screen, access your HDD, or read your mind - you've built your application and copied it to a different place, orr a different machine. And that machine doesn't have the DLL installed. This is why we use installation programs: to ensure that all the application dependency files are installed correctly alongside the app itself.

Create a Deployment project and use that to install your app.