This is our most common issue when people cannot sign in. This is not the same as having the wrong password. This happens because many of our customers signup by typing in the incorrect email address because of a spelling or punctuation error. For example, many users signup with @gnail instead of @gmail, or .con instead of .com.
Please reach out to us via the Support or Help Desk button in your app/browser and we will resolve the issue with haste.