polyfill.js:95 Uncaught TypeError: Cannot read property 'call' of undefined
at BluetoothDevice.dispatchEvent (polyfill.js:95)
at BluetoothRemoteGATTServer.disconnect (polyfill.js:214)
at MuseClient.disconnect (st-muse.js:4828)
at MuseComponent.disconnect (st-muse.js:4921)
at VNode.click (st-muse.js:4926)
at invokeHandler (app.core.js:846)
at handleEvent (app.core.js:840)
at HTMLButtonElement.handler (app.core.js:832)
For instance: