TypeError: Path must be a string

[Evanlec]

I am running bugger app.js, then open the printed link into Chrome, Chrome then says "Debugging connection terminated, reason: websocket_closed" and I then see the following error in my terminal:

   TypeError: Path must be a string. Received undefined
       at assertPath (path.js:7:11)
       at Object.dirname (path.js:1326:5)
       at Module._compile (/usr/local/lib/node_modules/bugger/lib/cli.js:80:24)
       at _createContext (/usr/local/lib/node_modules/bugger/lib/agents/runtime/index.js:26:5)
       at new RuntimeAgent (/usr/local/lib/node_modules/bugger/lib/agents/runtime/index.js:40:25)
       at new Agents (/usr/local/lib/node_modules/bugger/lib/agents.js:42:21)
       at setupAgents (/usr/local/lib/node_modules/bugger/lib/bugger.js:50:20)
       at Thread.onDevtoolsMessage (/usr/local/lib/node_modules/bugger/lib/bugger.js:78:7)
       at emitOne (events.js:96:13)
       at Thread.emit (events.js:188:7)
       at Thread._handle.message (/usr/local/lib/node_modules/bugger/lib/thread.js:12:12) }

I tried the following, but no luck:

bugger ./app.js
bugger "./app.js"