DllNotFoundException on server startup (GpuDriver.dll / libopus-0)

Description of issue

When you start the server, it shows a big red error message in the console and stops.
The error says:
DllNotFoundException: GpuDriver.dll or DllNotFoundException: libopus-0.
This happens when some needed files (dependencies) are missing.

Solution

Windows hosts

1. Install Visual C++ Redistributable for Visual Studio 2015 (x64).

   • If the error still shows, also install the x86 version.

2. Install Mono (stable).

3. Restart your computer (recommended) or restart the server.

Linux hosts

1. Install Mono (stable) using your system’s package manager or from the Mono website.
   Example: sudo apt install mono-complete

2. Restart the server.

Once the dependencies are installed, launch the server again. The startup error block should be gone and the server should boot normally