Theme Option issue - do not save the settings chosen
To any of you happen to set options in the Theme option and not see them changing in the frontend (color, font, etc).
When this happens there is a problem of write permissions on your server.
First check if the folder wp-content \ themes \ your theme \ cache has the permissions set in 755,
the second thing the folder must contain the files dynamics.css and google_font.json.
This file is created automatically every time you save the ThemeOption (Name Theme -> ThemeOption -> SaveOption).
If even after you save the Theme Options, yet there are not, you create them manually empty and after resave the Theme Option.
I hope this post will help you.
Have a nice day.