Slider nicht mehr zu bearbeiten, fehlermeldung

Hallo leider bekomme ich bei den sliders eine fehlermeldung. Ich bitte um hilfe.

HTML:

FATAL ERROR(1): "Uncaught exception 'UnexpectedValueException' with message 'No language code has been found' in /var/www/web28/html/store/GXMainComponents/Shared/LanguageProvider.inc.php:127
Stack trace:
#0 /var/www/web28/html/store/GXMainComponents/Controllers/HttpView/Admin/SlidersDetailsController.inc.php(218): LanguageProvider->getCodeById(Object(IdType))
#1 /var/www/web28/html/store/GXMainComponents/Controllers/HttpView/Admin/SlidersDetailsController.inc.php(198): SlidersDetailsController->_getSlideData(Object(Slide))
#2 /var/www/web28/html/store/GXMainComponents/Controllers/HttpView/Admin/SlidersDetailsController.inc.php(92): SlidersDetailsController->_getSliderSlidesData(Object(Slider))
#3 [internal function]: SlidersDetailsController->actionDefault()
#4 /var/www/web28/html/store/GXEngine/Services/System/Http/HttpViewController.inc.php(152): call_user_func(Array)
#5 /var/www/web28/html/store/GXEngine/Services/System/Http/HttpViewController.inc.php(107): HttpViewController->_callActionMethod('')
#6 /var/www/web28/html/"Information:
<br />
<b>Fatal error</b>:  Uncaught exception 'UnexpectedValueException' with message 'No language code has been found' in /var/www/web28/html/store/GXMainComponents/Shared/LanguageProvider.inc.php:127
Stack trace:
#0 /var/www/web28/html/store/GXMainComponents/Controllers/HttpView/Admin/SlidersDetailsController.inc.php(218): LanguageProvider-&gt;getCodeById(Object(IdType))
#1 /var/www/web28/html/store/GXMainComponents/Controllers/HttpView/Admin/SlidersDetailsController.inc.php(198): SlidersDetailsController-&gt;_getSlideData(Object(Slide))
#2 /var/www/web28/html/store/GXMainComponents/Controllers/HttpView/Admin/SlidersDetailsController.inc.php(92): SlidersDetailsController-&gt;_getSliderSlidesData(Object(Slider))
#3 [internal function]: SlidersDetailsController-&gt;actionDefault()
#4 /var/www/web28/html/store/GXEngine/Services/System/Http/HttpViewController.inc.php(152): call_user_func(Array)
#5 /var/www/web28/html/store/GXEngine/Services/System/Http/HttpViewController.inc.php(107): HttpViewController-&gt;_callActionMethod('')
#6 /var/www/web28/html/ in <b>/var/www/web28/html/store/GXMainComponents/Shared/LanguageProvider.inc.php</b> on line <b>127</b><br />

 

Beide drinn. Ich hatte das gebucht da das gefehlt hatte. Jetzt bin ich gerade auf diesen fehler gestoßen.
Lg