I bought the parent theme here
https://themeforest.net/item/flatsome-multipurpose-responsive-woocommerce-theme/5484319
So i could the child theme simply activate.
No extra download was needed.
Thank you for your fast reply.
I’m using a Flatsome Child Theme and it doesn’t work.
When i activate parent Flatsome Theme, or Twentytwenty, my problem is solved.
Is there a way that i can continue my work with Flatsome Child and solve my problem?
It would be the last option to change the Theme.