v3.8.x Fehler im Log bzgl. SingleSignOn

Hallo alle,
folgenden Meldungen haben ich unregelmäßig im Fehlerlog, für alle konfigurierten SingleSignOn Dienste, hat irgendeiner eine Idee oder einen Hinweis?

Code:

2018-04-16 22:50:58 (4841fd497c536f358e670c766f2236cb) FATAL ERROR(1): "Uncaught LogicException: No controller class found for [singlesignon] in /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/Factories/HttpViewControllerFactory.inc.php:97

Stack trace:

#0 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/Factories/HttpViewControllerFactory.inc.php(70): HttpViewControllerFactory->_getControllerClassName('singlesignon')

#1 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/HttpDispatcher.inc.php(67): HttpViewControllerFactory->createController('singlesignon')

#2 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/HttpService.inc.php(67): HttpDispatcher->dispatch(Object(HttpContextServerData))

#3 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/shop.php(30): HttpService->handle(Object(HttpContextServerData))

#4 {main}

  thrown"Request: GET /shop.php?do=singlesignon/redirect&service=paypal (Details)
        - duration: ~6872ms
        - server: Apache
        - server address: 128.127.64.7
        - user agent: Mozilla/5.0 (X11; Datanyze; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36
        - remote address: 4841fd497c536f358e670c766f2236cb
Session:  (Details)
        - tpl: Honeygrid
        - MOBILE_ACTIVE: false
        - language: german
        - languages_id: 2
        - language_charset: utf-8
        - language_code: de
        - currency: EUR
        - customers_status: [...]
        - cart: [...]
        - wishList: [...]
        - 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:  (Details)
        - do: singlesignon/redirect
        - service: paypal
Information:
<br />

<b>Fatal error</b>:  Uncaught LogicException: No controller class found for [singlesignon] in /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/Factories/HttpViewControllerFactory.inc.php:97

Stack trace:

#0 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/Factories/HttpViewControllerFactory.inc.php(70): HttpViewControllerFactory-&gt;_getControllerClassName('singlesignon')

#1 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/HttpDispatcher.inc.php(67): HttpViewControllerFactory-&gt;createController('singlesignon')

#2 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/HttpService.inc.php(67): HttpDispatcher-&gt;dispatch(Object(HttpContextServerData))

#3 /var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/shop.php(30): HttpService-&gt;handle(Object(HttpContextServerData))

#4 {main}

  thrown in <b>/var/www/vhosts/xxxxxxxxxxxxxxx.de/shop/GXEngine/Services/System/Http/Factories/HttpViewControllerFactory.inc.php</b> on line <b>97</b><br />