First, make sure you have set up a rent portal account before you sign up for Flex.
Some properties use smaller rent portals that are not yet integrated with Flex. If your rent portal is not currently supported, please send us a request to add it to Flex. You can reach out HERE. Please include the address and name of the property to be added.
Second, try to reset your password through your rent portal and try again.
If you are able to log into your rent portal directly with the credentials, and you are still receiving an error, please reach out to our support team for help.