Uncaught TypeError: Cannot read property 'on' of undefined

[laraws]

When I click coplay-connect button, the console display this error and can't connect successfully.

chrome-extension://heolgpojkkeacaokbpolhalhlaidpkkc/coplay.js:908 Uncaught TypeError: Cannot read property 'on' of undefined
    at Object.coplay.connect (chrome-extension://heolgpojkkeacaokbpolhalhlaidpkkc/coplay.js:908)
    at HTMLButtonElement.<anonymous> (chrome-extension://heolgpojkkeacaokbpolhalhlaidpkkc/coplay.js:527)
    at HTMLButtonElement.<anonymous> (chrome-extension://heolgpojkkeacaokbpolhalhlaidpkkc/coplay.js:88)
coplay.connect @ chrome-extension://heolgpojkkeacaokbpolhalhlaidpkkc/coplay.js:908
(anonymous) @ chrome-extension://heolgpojkkeacaokbpolhalhlaidpkkc/coplay.js:527
(anonymous) @ chrome-extension://heolgpojkkeacaokbpolhalhlaidpkkc/coplay.js:88

[1iver]

A minute later, the add-on will lose connection with the server. so make sure finish all opeation in one minute. both side