/Users/Shared/XLN Audio/Addictive Drums 2/Presets/Bus Layouts

The error message is undeniably annoying, but it is rarely a sign of permanent damage. In the vast majority of cases, it is caused by a simple, corrupted preference file that can be deleted in under 60 seconds (Fix #1).

Open your DAW (e.g., Ableton , REAPER, or FL Studio ) and ensure its VST scan path matches the installer's path.

Based on analysis of user reports across multiple DAW communities, this error stems from a between the AD2 plugin executable and its core library files. The technical root cause is the plugin's inability to locate the BusLayouts.xml or similar specification files during initialization.

This is the "golden fix" for 80% of users seeing the error. You are not deleting the drums or samples; you are deleting the settings file that tells AD2 what you were last doing.