I am following the detailed instructions to install Civi under Wordpress. I am running a local development Wordpress site using MariaDB 10. I have downloaded and activated the CiviCRM plugin. The CiviCRM installer is accessible. I have created a new empty database and user for CiviCRM and I can get a full "Green" ("You're ready to install") from the installer. But when I click on "Check requirements and install" I get an error:
"Cannot open mysql://[user]:[password]@localhost:3307/[path_to_database]?new_link=true: DB Error: connect failed."
The server port number is correct for this installation.
Any idea where I can look for more detail on why the connection fails at this stage?