Issues with mobile menu

Hi, I am having issues with the mobile menu for this website https://canineshine.ca/. The page is on a personal plan, so there are no plugins that I seem to be able to deactivate. I can add things to the menu, but the text is in white and for some reason I can’t adjust it (the text across the website is set to black). I’d would love some help with this – without it – the site is kind of useless.

The page I need help with: [log in to see the link]