If your content within Splice INSTRUMENT becomes broken in any way, the plugin will automatically detect this and provide you with a red exclamation mark indicating that something is wrong with that pack or preset.
If you see this warning, you can resolve the issue by using the "Repair" option found in the menu for that content.
This process will redownload any missing or broken content (patch files, sample files, configuration, etc.) allowing the plugin to load this content for your project.
Please note that currently this will not work for content that has been migrated over from LABS. This is will be addressed in an upcoming update.