Problem with mobile view of a main menu

Hi,
I tried to switch on an image type of site logo at settings of style of a template.
After it original settings of a main menu was deleted (maybe its a bug). I tried to correct it at "menus" part of template settings. 
I got a similar view of main menu, but my mobile view is not working correctly (colors invisible).

Where I may correct a mobile view of my main menu?
I tried to correct a side menu, but its not a mobile view of main menu - its a menu from blog page.

therb.org/ - my site


 

Hello,

What PHP version you are using? If it’s PHP 8 please change it to PHP 7.4 because our templates are not 100% ready for PHP 8 (we are working on it).

Regards,
Milos

Milos, my settings is 7.4

Apache 2.4 + PHP 7.4 opcache

Where I may change settings of mobile view of main menu?

Hello,

Please see the attached image. These are the correct settings for the menu in the Learning template.

 

Regards,
Milos

Cool, thank you!

PS I did not understand firstly how to set a button color like at your example I was need just to delete a value at that field