[Theme Horse Support Team]

Hi Schuller,

Sorry for late reply. We missed your topic.
It seems that bootstrap CSS is conflicting the main theme CSS please go to Appearance -> Customize/Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save button:

#access a {
  -webkit-box-sizing: inherit;
  -moz-box-sizing: inherit;
  box-sizing: inherit;
}

Thank you!