BTT App will not connect to my Mac

Describe the bug
BTT app will not connect to my MacBook Pro

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
BTT App

Device information:

  • Type of Mac: MacBook Pro (13-inch, 2017, Four Thunderbolt 3 Ports)
  • macOS version: 10.14.3
  • BetterTouchTool version: 2.716