file not found message in main navigation wrapper class

Hi,

I get a “File not found” message above slider in Goodlayer Modernize theme, just in inspector is in header-content-wrapper class. I used also “The Events Calendar” from Modern Tribe and put the category in Menu. But then I deleted some events and the category from Events in dashboard and now i get this message.
Can u help me in getting of this? I am a new in WordPress.

And my site is in development mode, i am in localhost and mamp.

Thank you!