Created attachment 146181 [details]
Screenshot with error message

SUMMARY
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The following error message appears when clicking on image preview in "Object details" (i.e. in the "What's up tonight" tool):

 "Unable to create io-slave. Can not find 'kioslave5' executable at '/Applications/KStars.app/Contents/MacOS, /Applications/KStars.app/Contents/libexec, /Applications/KStars.app/Contents/libexec/kf5, /Applications/KStars.app/Contents/Frameworks/kf5, /Users/packaging/Craft/BC/macos-64-clang/lib/libexec/kf5' 


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STEPS TO REPRODUCE
1. Open "What's up Tonight" under the "Tools" menu, select a matching object and click "Object Details" button.
2.  A new "Object Details" window appears with a default preview image.
3.  Click on the image preview and a new "Choose Thumbnail Image" window appears together with the following error message"

"Unable to create io-slave. Can not find 'kioslave5' executable at '/Applications/KStars.app/Contents/MacOS, /Applications/KStars.app/Contents/libexec, /Applications/KStars.app/Contents/libexec/kf5, /Applications/KStars.app/Contents/Frameworks/kf5, /Users/packaging/Craft/BC/macos-64-clang/lib/libexec/kf5' 

OBSERVED RESULT

Error message as described and in attached screenshot

EXPECTED RESULT

Being able to select an image to apply to the object.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 12.1
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

KStars: 3.5.7, downloaded from the KDE KStars website (https://edu.kde.org/kstars/)