Database Query Error - You've Probably Found a Bug

Cannot connect to database server.

Please give all the information on this page to your support personnel.

Query Connecting to database server... failed. The DBMS said this:

Access denied for user 'root'@'localhost' (using password: NO)

Debug Backtrace (most recent call first):

E:\xampp-mylib-2021\htdocs\watluang\classes\Error.php:100 FatalHandler->printBackTrace()
E:\xampp-mylib-2021\htdocs\watluang\classes\Error.php:68 FatalHandler->dbError('Connecting to database server...', 'Cannot connect to database server.', 'Access denied for user \'root\'@\'localhost\' (using password: NO)')
E:\xampp-mylib-2021\htdocs\watluang\classes\Query.php:18 Fatal->dbError('Connecting to database server...', 'Cannot connect to database server.', 'Access denied for user \'root\'@\'localhost\' (using password: NO)')
E:\xampp-mylib-2021\htdocs\watluang\shared\read_settings.php:21 Query->Query()
E:\xampp-mylib-2021\htdocs\watluang\shared\common.php:110 require_once('E:\\xampp-mylib-2021\\htdocs\\watluang\\shared\\read_settings.php')
E:\xampp-mylib-2021\htdocs\watluang\home\index.php:6 require_once('E:\\xampp-mylib-2021\\htdocs\\watluang\\shared\\common.php')