If you have an error for event_bindings in your chrome console that looks something like this:
Error in event handler for ‘undefined’:
Unexpected token u SyntaxError: Unexpected token u at Object.parse (native) at chrome-extension://hobijieodegdbpakkfiopclcljnomfnj/ylc.js:120:23 at miscellaneous_bindings:288:9 at chrome.Event.dispatchToListener (event_bindings:390:21) at chrome.Event.dispatch_ (event_bindings:376:27) at chrome.Event.dispatch (event_bindings:396:17) at Object.chromeHidden.Port.dispatchOnMessage (miscellaneous_bindings:254:22)
It is most likely due to a rogue chrome plugin. In manage extensions, search for the one listed in the error message. In my case, it is hobijieodegdbpakkfiopclcljnomfnj and disable it. Restart your browser and all should be well again.