There seems to be old code in this theme component. I get this admin information with the latest Discourse rebuild:
[Admin-Hinweis] Theme ‘image-alignment’ enthält Code, der aktualisiert werden muss. (ID:discourse.script-tag-discourse-plugin) (mehr erfahren)
And in browser development console:
[THEME 47 ‘image-alignment’] Deprecation notice: Adding JS code using
<script type='text/discourse-plugin'>is deprecated. Move this code to a dedicated JavaScript file. [deprecation id: discourse.script-tag-discourse-plugin] [info: Modernizing inline script tags for templates & JS API]