Thanks for your help Bruno, the truth is that the post has not helped me much in solving my problem (since that is what I had done to update the theme).
I leave you what I have done in case another user can help you,
After updating the theme, go in your WordPress to:
Appearance > Themes > Install plugins > Install Bridge Core > Enable Bridge Core
You delete the cache and the Qode Options appear to be able to enter the CSS of the previous template
Good day and best regards,
PS Thank you very much again for your quick response and attention.
Answered: 05/28/2021 3:15 pm