If you are still struggling with this error, I'd recommend following our
Troubleshooting Guide to see if there's any underlying errors in your browser or backend logs that are visible. It's important to find the errors behind that "Invalid email address or password" message in the user interface, as the underlying errors will provide clues as to why it's failing.
Since it sounds like you might have a newer installation, it's possible you'll find that you are hitting one of the errors in our
"Common Installation Issues" (at the bottom of the installation guide).