I have the same problem.
username and password:
I have to change the details for the username and password in the config file so i dont think i have the wrong details ( i made them up myself, i can use whatever i like i think).
host:
For my host i used: /** MySQL hostname */
define(‘DB_HOST’, ‘localhost’); because i am using WAMP on my pc.
Databaseserver running:
Yes its running, WAMP
After this I try to open https://localhost/wp-admin/install.php but then I get these error-messages. Don’t know how to fix it, maybe somone can help me thanks!!
regards