[Theme: Portra] Mobile device, hamburger icon, has changed to "m"

Hi there,

I’m using Portra theme by Wpshower.

Even though I checked the font directory, the hamburger icon is there in the ttf file, in the right place. But the mobile version of my site shows a lowercase “m” letter instead of that 3 bar hamburger icon.

When you check the live demo of Portra theme (https://portra.wpshower.com) on a mobile device, hamburger icon is standing smoothly where it is supposed to be whereas https://tasarimnotlari.co ,which is my site; there is “m” letter staring at me…

Any hints?

Thanks a lot!