Error when retrieving media

[mobreviews]

When I try to retrieve my media on my test machine I get an error

#message: "Unexpected Spatie\MediaLibrary\MediaCollections\Exceptions\InvalidConversion thrown from a caster: There is no conversion named `preview`"

The media is listed in the tables and stored without any warnings, errors, etc.

[mobreviews]

Does anyone have any ideas? I'm not even creating a conversion 'preview' in my library definition so I'm guessing that is something done by the package itself.