Shop lässt sich plözlich nicht mehr aufrufen 3.12.0.2

Hallo an Alle,
laut dem Kunden, wurde nichts verändert, aber das ist ja immer so.
Ich habe bereits alle Zahlungs und Versandmodule durchgeschaut ob irgendwo ein Eintrag fehlt, aber nichts gefunden.
Caches per FTP geleert. Browser Cache geleert.

Jemand Ideen wo ich noch schauen könnte?

Admin läuft ohne Probleme.

Code:

2020-03-27 10:49:22 (eb43a3625181e15d5f1275d43e3b1a59) USER ERROR(256): "check_data_type validation failed. Dump: , string expected, but NULL detected" in /var/www/vhosts/httpdocs/vendor/sentry/sentry/lib/Raven/ErrorHandler.php:127

#8    File: /var/www/vhosts/httpdocs/vendor/sentry/sentry/lib/Raven/ErrorHandler.php:127

    Code:
│    line 125:                     $file,
│    line 126:                     $line,
├─    line 127:                     $context
│    line 128:                 );
│    line 129:             } else {

#7


#6    File: /var/www/vhosts/httpdocs/gm/inc/check_data_type.inc.php:53

    Code:
│    line 51:             else
│    line 52:             {
├─    line 53:                 trigger_error('check_data_type validation failed. Dump: ' . print_r($p_data, true) . ', string expected, but ' . gettype($p_data) . ' detected', $p_error_level);
│    line 54:                 return false;
│    line 55:             }

#5    File: /var/www/vhosts/httpdocs/system/core/BaseClass.inc.php:146

    Code:
│    line 144:         }
│    line 145:
├─    line 146:         $t_valid = check_data_type($p_variable_value, $t_type, $t_strict, $t_error_level, $t_class_name);
│    line 147:        
│    line 148:         return $t_valid;

#4    File: /var/www/vhosts/httpdocs/system/core/BaseClass.inc.php:56

    Code:
│    line 54:         if(array_key_exists($p_variable_name, $this->validation_rules_array))
│    line 55:         {
├─    line 56:             if($this->check_data_type($p_variable_name, $p_variable_value) == false)
│    line 57:             {
│    line 58:                 return false;

#3    File: /var/www/vhosts/httpdocs/system/classes/layout/LayoutContentControl.inc.php:121

    Code:
│    line 119:         $coo_layout_view->set_('coo_xtc_price', $this->coo_xtc_price);
│    line 120:         $coo_layout_view->set_('error_message', $t_error_message);
├─    line 121:         $coo_layout_view->set_('head_content', $t_head_content);
│    line 122:         $coo_layout_view->set_('info_message', $t_info_message);
│    line 123:         $coo_layout_view->set_('main_content', $this->main_content);

#2    File: /var/www/vhosts/httpdocs/system/overloads/LayoutContentControl/MailBeezAutoLogoffLayoutContentControl.inc.php:37

    Code:
│    line 35:     public function proceed()
│    line 36:     {
├─    line 37:         $parentReturn = parent::proceed();
│    line 38:
│    line 39:         if($this->isRequestInWhitelist()) {

#1    File: /var/www/vhosts/httpdocs/GXModules/Werbe-Markt/Ladezeitoptimierung/Shop/Overloads/LayoutContentControl/WMLadezeitoptimierungCache.php:15

    Code:
│    line 13:     private $footerCss = array();
│    line 14:     public function proceed() {
├─    line 15:         parent::proceed();
│    line 16:         if (!gm_get_conf('MODULE_CENTER_LADEZEITOPTIMIERUNG_INSTALLED') || strpos($this->v_output_buffer, '</body>') === false || strpos($this->v_output_buffer, 'RecaptchaOptions') !== false) {
│    line 17:             return false;

#0    File: /var/www/vhosts/httpdocs/index.php:191

    Code:
│    line 189: $coo_layout_control->set_('main_content', $t_main_content);
│    line 190: $coo_layout_control->set_('request_type', $GLOBALS['request_type']);
├─    line 191: $coo_layout_control->proceed();
│    line 192:
│    line 193: $t_redirect_url = $coo_layout_control->get_redirect_url();

Request: GET /
    - duration: ~389ms
    - server: Apache
    - server address: 81.169.205.155
    - user agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36
    - remote address: eb43a3625181e15d5f1275d43e3b1a59

Session:
    - tpl: Honeygrid
    - language: german
    - languages_id: 2
    - language_charset: utf-8
    - language_code: de
    - currency: EUR
    - customers_status: Array
        (
            [customers_status_id] => 1
            [customers_status_name] => Gast
            [customers_status_image] => guest_status.gif
            [customers_status_discount] => 0.00
            [customers_status_public] => 1
            [customers_status_min_order] => 0
            [customers_status_max_order] => 0
            [customers_status_ot_discount_flag] => 0
            [customers_status_ot_discount] => 0.00
            [customers_status_graduated_prices] => 1
            [customers_status_show_price] => 1
            [customers_status_show_price_tax] => 1
            [customers_status_add_tax_ot] => 0
            [customers_status_payment_unallowed] =>
            [customers_status_shipping_unallowed] =>
            [customers_status_discount_attributes] => 0
            [customers_fsk18_purchasable] => 0
            [customers_fsk18_display] => 1
            [customers_status_write_reviews] => 0
            [customers_status_read_reviews] => 1
        )
       
    - cart: shoppingCart Object
        (
            [contents] => Array
                (
                )
       
            [total] => 0
            [weight] => 0
            [content_type] =>
        )
       
    - wishList: wishList Object
        (
            [contents] => Array
                (
                )
       
            [total] => 0
            [weight] => 0
            [content_type] =>
        )
       
    - customer_id: ### Session entry not present ###
    - payment: ### Session entry not present ###
    - shipping: ### Session entry not present ###
    - cartID: ### Session entry not present ###
    - sendto: ### Session entry not present ###
    - billto: ### Session entry not present ###

Get:
    - gm_boosted_category:

 

Hatte das Ding auch schon in Verdacht und hatte es Deinstalliert, leider ohne Erfolg.