I'm having a similar issue.
I have a Workforce account to view my personal paystubs, but my employer has sent me a link to join my companies QuickBooks Online Essentials team. When I follow the link (which I have tried opening on multiple browsers, devices, private tabs, incognito, etc), it wants me to create an account. When I attempt to create an account, it won't let me since I already have one with that email.
However, when I click to Log In, I will type in my correct log in information and then it brings up an error that says, "There's an issue on our end. We're on it."
But they've been "on it" for over a month now since that is how long ago we started attempting it.
They have deleted and resent the invitation multiple times to no avail.
