Can’t change url because site address is greyed out

Check in wp-config.php in the root directory of your site, if the WP_SITEURL and WP_HOME constants are hard-coded there the corresponding boxes in the settings will be greyed out as you describe.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)