Update not working

Hi there, I have wildster theme and a child theme installed. I followed the update instructions, noting that the wildster theme was already not active as the child theme was active. When I upload the new wildster theme folder either by FTP or Zip extraction in Cpanel, in both instances the website displays this (any page I go to)
I have deleted all the references to the Database names and any keys from the code below.
Please advise on how to update the theme without this issue arising.
Regards

/** * The base configurations of the WordPress. * * This file has the following configurations: MySQL settings, Table Prefix, * Secret Keys, WordPress Language, and ABSPATH. You can find more information * by visiting {@link https://codex.wordpress.org/Editing_wp-config.php Editing * wp-config.php} Codex page. You can get the MySQL settings from your web host. * * This file is used by the wp-config.php creation script during the * installation. You don’t have to use the web site, you can just copy this file * to “wp-config.php” and fill in the values. * * @package WordPress */ // ** MySQL settings – You can get this info from your web host ** // /**
WordPress Database Table prefix. * * You can have multiple installations in one database if you give each a unique * prefix. Only numbers, letters, and underscores please! */ $table_prefix = ‘wp_’; /** * WordPress Localized Language, defaults to English. * * Change this to localize WordPress. A corresponding MO file for the chosen * language must be installed to wp-content/languages. For example, install * de_DE.mo to wp-content/languages and set WPLANG to ‘de_DE’ to enable German * language support. */ define(‘WPLANG’, ”); /** * For developers: WordPress debugging mode. * * Change this to true to enable the display of notices during development. * It is strongly recommended that plugin and theme developers use WP_DEBUG * in their development environments. */ define(‘WP_DEBUG’, false); /* That’s all, stop editing! Happy blogging. */ /** Absolute path to the WordPress directory. */ if ( !defined(‘ABSPATH’) ) define(‘ABSPATH’, dirname(__FILE__) . ‘/’); /** Sets up WordPress vars and included files. */ require_once(ABSPATH . ‘wp-settings.php’);