Menu not showing, wild color changes. My mobile menu drives me crazy


My dropdown menu in my navbar for mobile view is not working. I click it and it only changes to background color of the button (why though? I can’t find where the background color is coming from).
Do you guys have an idea what I did wrong and how I can make it show the menu after the hamburger icon is pressed?

Thank you!

Here is my site Read-Only: Webflow - Jannik Godric Webseite (Main)