CiviCRM menu bar corrupted after installing Shoreditch
There has been some work going on to support shoreditch for CiviCRM 5.13. The temporary solution(until a new release is available) is to make the Menu colour to white by navigating to CiviCRM >> Administer >> Customize Data and Screens >> Display Preferences. Update the form by changing the 'Menu Color' to white

Cheers

Pradeep