Whatever you think this should be doing, it isn't doing it correctly. There's just a spinner with "Connecting ..." below it and it never does anything.
There is a warning message in the console that says...
`enable` method has been called while MetaMask is not available or synchronising. Nothing will be done in this case.
...so *probably* there's something wrong in your code, maybe in the way/order it's packed or loaded or maybe it's missing stuff.