Title: Slider plugin causing fatal error?
Last modified: August 30, 2016
---
# Slider plugin causing fatal error?
* Resolved [amokdesign](https://wordpress.org/support/users/amokdesign/)
* (@amokdesign)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/)
* Hi, i have just been setting up a wordpress site using a theme that had a slider
plugin included, i was just about ready to launch the site and the last thing
i did was create the slider and now when i try to access my admin panel or dashboard
i get the following fatal error message
* Fatal error: Call to undefined function request_filesystem_credentials() in /
home/loveh237/public_html/wp-admin/includes/class-wp-upgrader-skins.php on line
75
* I need to get this site up today so any help would be greatly appreciated, and
advice on an alternate slider plugin that i could try instead if you think that
the slider is causing my error message? Thankyou so much, Steph
Viewing 14 replies - 1 through 14 (of 14 total)
* [jakedohm](https://wordpress.org/support/users/jakedohm/)
* (@jakedohm)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/#post-6501099)
* Can you provide a link to the website, or is it not live?
* Thread Starter [amokdesign](https://wordpress.org/support/users/amokdesign/)
* (@amokdesign)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/#post-6501100)
* Hi, its not live yet, it has an under construction plugin blocking it. It has
been suggested that it is masterslider causing the error. What is strange is
that i have been trying all morning to access wordpress and just getting this
error message, and then randomly one attempt was succesful and the site looked
good with everything working, but when i tried to delete the plugin i got stuck
behind the same fatal error screen.
Fatal error: Call to undefined function
request_filesystem_credentials() in /home/loveh237/public_html/wp-admin/includes/
class-wp-upgrader-skins.php on line 75 if i use the browsers back button i can
back to my site preview, navigate around different pages etc, but everytime i
try to “edit page” or go to dashboard etc i get the same error
* I really appreciate your help, i am so stuck here and its ready to go live if
i can just resolve this issue!!
Thanks so much, Steph
* [jakedohm](https://wordpress.org/support/users/jakedohm/)
* (@jakedohm)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/#post-6501101)
* What is on line 75 of class-wp-upgrader-skins.php?
* Thread Starter [amokdesign](https://wordpress.org/support/users/amokdesign/)
* (@amokdesign)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/#post-6501106)
* Line 75 reads :
* `return request_filesystem_credentials( $url, '', $error, $context, $extra_fields,
$allow_relaxed_file_ownership );`
* [jakedohm](https://wordpress.org/support/users/jakedohm/)
* (@jakedohm)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/#post-6501107)
* Have you tried downloading WordPress and just replacing that file from a fresh
wordpress download?
* Thread Starter [amokdesign](https://wordpress.org/support/users/amokdesign/)
* (@amokdesign)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/#post-6501108)
* No, im a complete novice with this sorry! How do i download a new version of
wordpress, i have simply used softaculous to install it for me on my domain so
far, do i need to create a new file for it through file manager?
thanks,
* [jakedohm](https://wordpress.org/support/users/jakedohm/)
* (@jakedohm)
* [10 years, 8 months ago](https://wordpress.org/support/topic/slider-plugin-causing-fatal-error/#post-6501110)
* Below is the code I have from a fresh copy of WP.
Copy and paste all of that
into the document via file manager.
* ```
'', 'nonce' => '', 'title' => '', 'context' => false );
$this->options = wp_parse_args($args, $defaults);
}
/**
* @param WP_Upgrader $upgrader
*/
public function set_upgrader(&$upgrader) {
if ( is_object($upgrader) )
$this->upgrader =& $upgrader;
$this->add_strings();
}
/**
* @access public
*/
public function add_strings() {
}
/**
*
* @param string|false|WP_Error $result
*/
public function set_result($result) {
$this->result = $result;
}
/**
*
* @param bool $error
* @param string $context
* @param bool $allow_relaxed_file_ownership
* @return type
*/
public function request_filesystem_credentials( $error = false, $context = false, $allow_relaxed_file_ownership = false ) {
$url = $this->options['url'];
if ( ! $context ) {
$context = $this->options['context'];
}
if ( !empty($this->options['nonce']) ) {
$url = wp_nonce_url($url, $this->options['nonce']);
}
$extra_fields = array();
return request_filesystem_credentials( $url, '', $error, $context, $extra_fields, $allow_relaxed_file_ownership );
}
/**
* @access public
*/
public function header() {
if ( $this->done_header ) {
return;
}
$this->done_header = true;
echo '';
echo '
' . $this->options['title'] . '
';
}
/**
* @access public
*/
public function footer() {
if ( $this->done_footer ) {
return;
}
$this->done_footer = true;
echo '';
}
/**
*
* @param string|WP_Error $errors
*/
public function error($errors) {
if ( ! $this->done_header )
$this->header();
if ( is_string($errors) ) {
$this->feedback($errors);
} elseif ( is_wp_error($errors) && $errors->get_error_code() ) {
foreach ( $errors->get_error_messages() as $message ) {
if ( $errors->get_error_data() && is_string( $errors->get_error_data() ) )
$this->feedback($message . ' ' . esc_html( strip_tags( $errors->get_error_data() ) ) );
else
$this->feedback($message);
}
}
}
/**
*
* @param string $string
*/
public function feedback($string) {
if ( isset( $this->upgrader->strings[$string] ) )
$string = $this->upgrader->strings[$string];
if ( strpos($string, '%') !== false ) {
$args = func_get_args();
$args = array_splice($args, 1);
if ( $args ) {
$args = array_map( 'strip_tags', $args );
$args = array_map( 'esc_html', $args );
$string = vsprintf($string, $args);
}
}
if ( empty($string) )
return;
show_message($string);
}
/**
* @access public
*/
public function before() {}
/**
* @access public
*/
public function after() {}
/**
* Output JavaScript that calls function to decrement the update counts.
*
* @since 3.9.0
*
* @param string $type Type of update count to decrement. Likely values include 'plugin',
* 'theme', 'translation', etc.
*/
protected function decrement_update_count( $type ) {
if ( ! $this->result || is_wp_error( $this->result ) || 'up_to_date' === $this->result ) {
return;
}
if ( defined( 'IFRAME_REQUEST' ) ) {
echo '';
} else {
echo '';
}
}
/**
* @access public
*/
public function bulk_header() {}
/**
* @access public
*/
public function bulk_footer() {}
}
/**
* Plugin Upgrader Skin for WordPress Plugin Upgrades.
*
* @package WordPress
* @subpackage Upgrader
* @since 2.8.0
*/
class Plugin_Upgrader_Skin extends WP_Upgrader_Skin {
public $plugin = '';
public $plugin_active = false;
public $plugin_network_active = false;
/**
*
* @param array $args
*/
public function __construct( $args = array() ) {
$defaults = array( 'url' => '', 'plugin' => '', 'nonce' => '', 'title' => __('Update Plugin') );
$args = wp_parse_args($args, $defaults);
$this->plugin = $args['plugin'];
$this->plugin_active = is_plugin_active( $this->plugin );
$this->plugin_network_active = is_plugin_active_for_network( $this->plugin );
parent::__construct($args);
}
/**
* @access public
*/
public function after() {
$this->plugin = $this->upgrader->plugin_info();
if ( !empty($this->plugin) && !is_wp_error($this->result) && $this->plugin_active ){
echo '';
}
$this->decrement_update_count( 'plugin' );
$update_actions = array(
'activate_plugin' => '' . __( 'Activate Plugin' ) . '',
'plugins_page' => '' . __( 'Return to Plugins page' ) . ''
);
if ( $this->plugin_active || ! $this->result || is_wp_error( $this->result ) || ! current_user_can( 'activate_plugins' ) )
unset( $update_actions['activate_plugin'] );
/**
* Filter the list of action links available following a single plugin update.
*
* @since 2.7.0
*
* @param array $update_actions Array of plugin action links.
* @param string $plugin Path to the plugin file.
*/
$update_actions = apply_filters( 'update_plugin_complete_actions', $update_actions, $this->plugin );
if ( ! empty($update_actions) )
$this->feedback(implode(' | ', (array)$update_actions));
}
}
/**
* Plugin Upgrader Skin for WordPress Plugin Upgrades.
*
* @package WordPress
* @subpackage Upgrader
* @since 3.0.0
*/
class Bulk_Upgrader_Skin extends WP_Upgrader_Skin {
public $in_loop = false;
/**
* @var string|false
*/
public $error = false;
/**
*
* @param array $args
*/
public function __construct($args = array()) {
$defaults = array( 'url' => '', 'nonce' => '' );
$args = wp_parse_args($args, $defaults);
parent::__construct($args);
}
/**
* @access public
*/
public function add_strings() {
$this->upgrader->strings['skin_upgrade_start'] = __('The update process is starting. This process may take a while on some hosts, so please be patient.');
$this->upgrader->strings['skin_update_failed_error'] = __('An error occurred while updating %1$s: %2$s');
$this->upgrader->strings['skin_update_failed'] = __('The update of %1$s failed.');
$this->upgrader->strings['skin_update_successful'] = __( '%1$s updated successfully.' ) . ' ' . __( 'Show Details' ) . '' . __( 'Hide Details' ) . '';
$this->upgrader->strings['skin_upgrade_end'] = __('All updates have been completed.');
}
/**
* @param string $string
*/
public function feedback($string) {
if ( isset( $this->upgrader->strings[$string] ) )
$string = $this->upgrader->strings[$string];
if ( strpos($string, '%') !== false ) {
$args = func_get_args();
$args = array_splice($args, 1);
if ( $args ) {
$args = array_map( 'strip_tags', $args );
$args = array_map( 'esc_html', $args );
$string = vsprintf($string, $args);
}
}
if ( empty($string) )
return;
if ( $this->in_loop )
echo "$string
\n";
else
echo "$string
\n";
}
/**
* @access public
*/
public function header() {
// Nothing, This will be displayed within a iframe.
}
/**
* @access public
*/
public function footer() {
// Nothing, This will be displayed within a iframe.
}
/**
*
* @param string|WP_Error $error
*/
public function error($error) {
if ( is_string($error) && isset( $this->upgrader->strings[$error] ) )
$this->error = $this->upgrader->strings[$error];
if ( is_wp_error($error) ) {
$messages = array();
foreach ( $error->get_error_messages() as $emessage ) {
if ( $error->get_error_data() && is_string( $error->get_error_data() ) )
$messages[] = $emessage . ' ' . esc_html( strip_tags( $error->get_error_data() ) );
else
$messages[] = $emessage;
}
$this->error = implode(', ', $messages);
}
echo '';
}
/**
* @access public
*/
public function bulk_header() {
$this->feedback('skin_upgrade_start');
}
/**
* @access public
*/
public function bulk_footer() {
$this->feedback('skin_upgrade_end');
}
/**
*
* @param string $title
*/
public function before($title = '') {
$this->in_loop = true;
printf( '' . $this->upgrader->strings['skin_before_update_header'] . '
', $title, $this->upgrader->update_current, $this->upgrader->update_count);
echo '';
echo '';
$this->flush_output();
}
/**
*
* @param string $title
*/
public function after($title = '') {
echo '
' . sprintf($this->upgrader->strings['skin_update_failed_error'], $title, $this->error) . '
' . sprintf($this->upgrader->strings['skin_update_failed'], $title) . '
' . sprintf($this->upgrader->strings['skin_update_successful'], $title, 'jQuery(\'#progress-' . esc_js($this->upgrader->update_current) . '\').toggle();jQuery(\'span\', this).toggle(); return false;') . '
';
printf( '
' . __( 'Updating translations for %1$s (%2$s)…' ) . '
', $name, $this->language_update->language );
}
/**
*
* @param string|WP_Error $error
*/
public function error( $error ) {
echo '
';
parent::error( $error );
echo '
';
}
/**
* @access public
*/
public function after() {
echo '