Enfold update errors on October 18 update.

The update process failed on a staging install and I the process has left a broken site with an error message on the front end.

Here are the errors:

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HERE ARE THE ERROR MESSAGES:

“The update process is starting. This process may take a while on some hosts, so please be patient.

Enabling Maintenance mode…

Updating Theme Enfold (1/1)

Warning: preg_match() expects parameter 2 to be string, array given in /nas/content/staging/wattcommtest/wp-admin/includes/class-wp-upgrader.php on line 258

Warning: file_exists() expects parameter 1 to be a valid path, array given in /nas/content/staging/wattcommtest/wp-admin/includes/class-wp-upgrader.php on line 258

Warning: strip_tags() expects parameter 1 to be string, array given in /nas/content/staging/wattcommtest/wp-admin/includes/class-bulk-upgrader-skin.php on line 61
Downloading update from …

Warning: parse_url() expects parameter 1 to be string, array given in /nas/content/staging/wattcommtest/wp-admin/includes/file.php on line 970

Warning: preg_split() expects parameter 2 to be string, array given in /nas/content/staging/wattcommtest/wp-includes/kses.php on line 1325

Warning: strtolower() expects parameter 1 to be string, array given in /nas/content/staging/wattcommtest/wp-includes/http.php on line 517

An error occurred while updating Enfold: Download failed. A valid URL was not provided.

Disabling Maintenance mode…

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AFTER THE FAILED UPDATE, THIS ERROR NOW SHOWS ON THE WEBSITE FRONT END.

“Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘function add_custom_script’ not found or invalid function name in /nas/content/staging/wattcommtest/wp-includes/class-wp-hook.php on line 286”

— Michael Blair