Images folder for com_finder missing in media/com_finder in the joomla package.
See here :
https://github.com/joomla/joomla-cms/tree/staging/media/com_finder

And here:
administrator/components/com_finder/finder.xml

<media destination="com_finder" folder="media">
        <folder>js</folder>
        <folder>images</folder>
        <folder>css</folder>
</media>