Blank page BO after changing or upgrading (any) module 1.7.7.6

[renezo]

It is not possible to find at what exact moment te problem started, but after changing something in any module i get a blank page in the BO. Even when i put debug on yes. When manualy editing defines.inc i get the following error message. I hope someone can put me on the right track for a solution. All cache, Var/PROD and VAR/DEV are deleted and also the browser history. The problem excist in all browsers. Site info: Prestashop 1.7.7.6 PHP 7.3.29 Template: classic

Whoops something went wrong

1/1) RuntimeException

The "org" translation loader is not registered.
in Translator.php line 379
at Translator->doLoadCatalogue('nl-NL')in Translator.php line 277
at Translator->initializeCatalogue('nl-NL')in Translator.php line 128
at Translator->initializeCatalogue('nl-NL')in Translator.php line 314
at Translator->dumpCatalogue('nl-NL', object(ResourceCheckerConfigCache))in Translator.php line 299
at Translator->Symfony\Component\Translation\{closure}(object(ResourceCheckerConfigCache))in ResourceCheckerConfigCacheFactory.php line 43
at ResourceCheckerConfigCacheFactory->cache('/XXXXXXXX/var/cache/dev/translations/catalogue.nl-NL.L8dqxxF.php', object(Closure))in Translator.php line 300
at Translator->initializeCacheCatalogue('nl-NL')in Translator.php line 265
at Translator->loadCatalogue('nl-NL')in Translator.php line 241
at Translator->getCatalogue('nl-NL')in Translator.php line 198
at Translator->trans('Successful deletion.', array(), 'AdminNotificationsSuccess', null)in PrestaShopTranslatorTrait.php line 61
at Translator->trans('Successful deletion.', array(), 'AdminNotificationsSuccess', null)in LoggingTranslator.php line 47
at LoggingTranslator->trans('Successful deletion.', array(), 'AdminNotificationsSuccess', null)in DataCollectorTranslator.php line 50
at DataCollectorTranslator->trans('Successful deletion.', array(), 'AdminNotificationsSuccess', null)in PrestaShopTranslatorTrait.php line 61
at DataCollectorTranslator->trans('Successful deletion.', array(), 'Admin.Notifications.Success', null)in Controller.php line 338
at ControllerCore->trans('Successful deletion.', array('legacy' => 'htmlspecialchars'), 'Admin.Notifications.Success')in AdminController.php line 466
at AdminControllerCore->__construct()in LegacyContext.php line 86
at LegacyContext->getContext()in UserLocaleListener.php line 39
at UserLocaleListener->__construct(object(LegacyContext))in appDevDebugProjectContainer.php line 3224
at appDevDebugProjectContainer->getPrestashop_UserLocale_ListenerService()in appDevDebugProjectContainer.php line 3720
at appDevDebugProjectContainer->ContainerIyxgaak\{closure}()in EventDispatcher.php line 231
at EventDispatcher->sortListeners('kernel.request')in EventDispatcher.php line 61
at EventDispatcher->getListeners('kernel.request')in ContainerAwareEventDispatcher.php line 129
at ContainerAwareEventDispatcher->getListeners('kernel.request')in TraceableEventDispatcher.php line 259
at TraceableEventDispatcher->preProcess('kernel.request')in TraceableEventDispatcher.php line 137
at TraceableEventDispatcher->dispatch('kernel.request', object(GetResponseEvent))in HttpKernel.php line 127
at HttpKernel->handleRaw(object(Request), 1)in HttpKernel.php line 68
at HttpKernel->handle(object(Request), 1, false)in Kernel.php line 200
at Kernel->handle(object(Request), 1, false)in index.php line 82

Edited September 4, 2021 by renezo (see edit history)