In the SSL 360 Link, you have the ability to choose a plugin and its mappings to be hosted by default upon opening.
If the plugin you are hosting has two separate mono/stereo versions, then you may find you are introduced to the following error when opening that plugin as a default, and its version does not match the channel configuration in your DAW.
To combat this, we suggest using the favourites tool to quickly host your most used plugins, or making sure that the ticked default matches your channel configuration