Error when setting up ACC

Hi all,
I'm trying to set up an AAC through gesior and whenever I try to connect the AAC to my database its throwing this error:
Error ID:
More info: CANNOT CONNECT TO DATABASE: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: No such host is known.

File: C:\xampp\htdocs\classes/database_mysql.php Line: 22
File: C:\xampp\htdocs/install.php Line: 229

Thanks for the help <3

Tokiyn