Error al editar Categorías TreeToolbar.php

[RicRey]

Hola al tratar de editar una categoría me sale un error 500, al activar modo debug y display errors en el cpanel, me sale el siguiente mensaje, alguien me puede dar luces de como corregir esto?

 

Error
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Fatal error: Interface 'ITreeToolbarCore' not found in /home/sistegra/public_html/classes/tree/TreeToolbar.php on line 27

Fatal error: Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load interface "ITreeToolbarCore" from the global namespace. Did you forget a "use" statement? in /home/sistegra/public_html/classes/tree/TreeToolbar.php:27 Stack trace: #0 {main} Next LogicException: Request stack is empty in /home/sistegra/public_html/app/bootstrap.php.cache:3231 Stack trace: #0 [internal function]: Symfony\Component\HttpKernel\HttpKernel->terminateWithException(Object(Symfony\Component\Debug\Exception\ClassNotFoundException)) #1 /home/sistegra/public_html/vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php(606): call_user_func(Array, Object(Symfony\Component\Debug\Exception\ClassNotFoundException)) #2 /home/sistegra/public_html/vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php(668): Symfony\Component\Debug\ErrorHandler->handleException(Object(Symfony\Component\Debug\Exception\ClassNotFoundException), Array) #3 [internal function]: Symfony\Component\Debug\ErrorHandler::handleFa in /home/sistegra/public_html/app/bootstrap.php.cache on line 3231
~~~