If object has more than one derivate thumbnail is broken

Description

See for example:
https://www.db-thueringen.de/servlets/solr/find?condQuery=Identifikation+in+digitalen+Lernspielen

The first hit has three derivates and one contains only zip files. It seems that this leads to the error. In basket view it now works, thanks to resolved

Environment

None

Assignee

Michel Büchner

Reporter

Kathleen Neumann

Labels

None

URL

None

External issue ID

None

Components

Fix versions

Affects versions

Priority

Medium
Configure