How can I get rid of this horrible white checkboxes?

[Superfeuchter]

I use minimal theme, but I cannot find anything that helps in style settings.
I tested a new vault with minimal theme and same style settings.
The checkboxes are black as they should

Thanks for help!

[Superfeuchter]

And the solution is:
The plugin called “Text Generator” caused this.
I turned the plugin off and everything’s fine!!