Steinberg (the creator of the VST standard) has officially discontinued VST2. Many modern DAWs, including newer versions of Cubase and Ableton Live on Apple Silicon Macs, are phasing out VST2 support entirely.
Here are the key parameters that define its sound: vst plugin valhallaroom vst3 link
I can provide specific troubleshooting steps or custom presets based on your setup. Steinberg (the creator of the VST standard) has