drop-down sub menu on mobile not showing

Hi. Please look at my website

www.architales.org

in the mobile version the dropdown sub menu is not appearing. I would also like to increase the text size of the menu items on the mobile.I am not a coder and may not be able to make changes to the style sheet. Please let me know how to make this work.
thanks
Natasha

Hi Natasha,

I hope you are well today and thank you for your question.

in the mobile version the dropdown sub menu is not appearing.

It is displaying fine for me on clicking on the arrow as shown in the attached screenshot.

Have you tried this?

Could you please share the screenshot of the mobile menu that you are getting?

I would also like to increase the text size of the menu items on the mobile

You can try achieving this by adding the following CSS code in the Custom CSS option of your theme on the below path.

Admin Area -> Appearance -> Customize -> Additional CSS

@media (max-width: 768px){
.navbar-default .navbar-nav li a {
    font-size: 20px;
    }
}

Best Regards,
Movin

I reset the colors on the customize menu and it worked.
The code is showing an error.
thanks
Natasha

The code is showing an error.

Could you please share me the screenshot of what error it is displaying?