I am buidling a site local so I am not able send an URL. But the following is happening.

I have successfully created a calendar but when I open a calendar item, there is a button underneath with "Bakc" on it that doesn't work. Strangly enough, when I take my mouse over another part of the website underneath this button, things like 'Send to Google calendar' and 'Download as iCal' appear although there is nothing there.
When I go over the button "Back" nothing happens.

Is there a solution to fix this?