I created the user and db etc. as stated in the installation manual, then ran the install script.
Answered all the questions truthfully, then received the error message.
I used mysql to list the database, show all the users, and show all the grants.
I redid the password setting for the hqadmin user, with password hqadmin.
Took all the defaults. mysql is on the same server I'm installing to.
HTH Tom