Chart color Highcharts not appearing on grouping fields

Thanks for reporting, @Khoebeke. You can save the view and then go back and it should work. But we'll work on this issue.

This is fixed by the commit here: https://www.drupal.org/project/charts/issues/3412637#comment-15391283 🐛 Error when grouping field is set to none Needs review

Same problem here.
Charts 5.0.11
Drupal 10.1.6
If I select Enable color changer widget then I can change the color manually.