Same problem here. I go through the process of linking my google calendar and after successful login nothing happens.
I have done this from all devices. iPhone, iPad, We, MacBook.
Behavior is the same, the account fails to link to my Evernote account even after seeing the message:
"You have successfully connected your calendar to Evernote.
Feel free to close this tab and return to the app. "
Can we please get a resolution here?