some elements are not showing, but working

[Frankenstien97]

The heading element is visible in the toolbar and working fine. But the divider and the text color option boxes are blank ( I have added the images in app -> images). the divider is adding an hr but that line is not showing, even there is a cross option to delete the line. The color dialogue box appears but there are blank boxes only. if I select the text and press the boxes, it works, but the boxes are empty.
If the heading element is visible and working fine, why aren't the other two?

[Frankenstien97]

here is how it looks

[alextakitani]

Hey @Frankenstien97 have you added

*= require richtext

to your application.scss ?

I was having the same problem until I did it.