I just updated to 2019.1 and it kind of broke everything. Now I'm trying to fix all the "bugs" one by one, which is mildly annoying. I strongly suggest to try to avoid breaking changes and use some kind of "deprecation warnings" (e.g. in wrappers around the new function) for a few versions before ultimately removing or renaming functions. The way it goes atm is very bad in production usage IMO.
However, I can't figure out the problem which produces error 050 and logs like those:
#0 /var/customers/webs/xxxxx/vendor/aimeos/aimeos-core/lib/mshoplib/src/MShop/Common/Manager/Base.php(377): Aimeos\MW\DB\Statement\DBAL\Simple->execute()
#1 /var/customers/webs/xxxxx/vendor/aimeos/aimeos-core/lib/mshoplib/src/MShop/Common/Manager/Base.php(774): Aimeos\MShop\Common\Manager\Base->getSearchResults(Object(Aimeos\MW\DB\Connection\DBAL), '\n\t\t\t\t\tSELECT mp...')
#2 /var/customers/webs/xxxxx/vendor/aimeos/aimeos-core/lib/mshoplib/src/MShop/Product/Manager/Standard.php(741): Aimeos\MShop\Common\Manager\Base->searchItemsBase(Object(Aimeos\MW\DB\Connection\DBAL), Object(Aimeos\MW\Criteria\SQL), 'mshop/product/m...', 'mshop/product/m...', Array, NULL, 3)
#3 /var/customers/webs/xxxxx/vendor/aimeos/aimeos-core/lib/mshoplib/src/MShop/Common/Manager/Decorator/Depth.php(43): Aimeos\MShop\Product\Manager\Standard->searchItems(Object(Aimeos\MW\Criteria\SQL), Array, NULL)
#4 /var/customers/webs/xxxxx/vendor/aimeos/aimeos-core/lib/mshoplib/src/MShop/Index/Manager/DBBase.php(358): Aimeos\MShop\Common\Manager\Decorator\Depth->searchItems(Object(Aimeos\MW\Criteria\SQL), Array)
#5 /var/customers/webs/xxxxx/vendor/aimeos/aimeos-core/lib/mshoplib/src/MShop/Index/Manager/Standard.php(498): Aimeos\MShop\Index\Manager\DBBase->searchItemsIndexBase(Object(Aimeos\MW\Criteria\SQL), Array, 53, 'mshop/index/man...', 'mshop/index/man...')
#6 /var/customers/webs/xxxxx/vendor/aimeos/aimeos-core/lib/mshoplib/src/MShop/Common/Manager/Decorator/Depth.php(43): Aimeos\MShop\Index\Manager\Standard->searchItems(Object(Aimeos\MW\Criteria\SQL), Array, 53)
#7 /var/customers/webs/xxxxx/ext/ai-controller-frontend/controller/frontend/src/Controller/Frontend/Product/Standard.php(349): Aimeos\MShop\Common\Manager\Decorator\Depth->searchItems(Object(Aimeos\MW\Criteria\SQL), Array, 53)
#8 /var/customers/webs/xxxxx/ext/ai-client-html/client/html/src/Client/Html/Catalog/Base.php(618): Aimeos\Controller\Frontend\Product\Standard->searchItems(Object(Aimeos\MW\Criteria\SQL), Array, 53)
#9 /var/customers/webs/xxxxx/ext/ai-client-html/client/html/src/Client/Html/Catalog/Base.php(206): Aimeos\Client\Html\Catalog\Base->searchProducts(Object(Aimeos\MW\View\Standard))
#10 /var/customers/webs/xxxxx/ext/ai-client-html/client/html/src/Client/Html/Catalog/Lists/Standard.php(464): Aimeos\Client\Html\Catalog\Base->getProductList(Object(Aimeos\MW\View\Standard))
#11 /var/customers/webs/xxxxx/ext/ai-client-html/client/html/src/Client/Html/Catalog/Lists/Standard.php(171): Aimeos\Client\Html\Catalog\Lists\Standard->addData(Object(Aimeos\MW\View\Standard), Array, NULL)
#12 /var/customers/webs/xxxxx/htdocs/typo3conf/ext/aimeos/Classes/Controller/AbstractController.php(157): Aimeos\Client\Html\Catalog\Lists\Standard->getBody()
#13 /var/customers/webs/xxxxx/htdocs/typo3conf/ext/aimeos/Classes/Controller/CatalogController.php(70): Aimeos\Aimeos\Controller\AbstractController->getClientOutput(Object(Aimeos\Client\Html\Catalog\Lists\Standard))
#14 [internal function]: Aimeos\Aimeos\Controller\CatalogController->listAction()
#15 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php(316): call_user_func_array(Array, Array)
#16 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php(176): TYPO3\CMS\Extbase\Mvc\Controller\ActionController->callActionMethod()
#17 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/extbase/Classes/Mvc/Dispatcher.php(85): TYPO3\CMS\Extbase\Mvc\Controller\ActionController->processRequest(Object(TYPO3\CMS\Extbase\Mvc\Web\Request), Object(TYPO3\CMS\Extbase\Mvc\Web\Response))
#18 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/extbase/Classes/Mvc/Web/FrontendRequestHandler.php(91): TYPO3\CMS\Extbase\Mvc\Dispatcher->dispatch(Object(TYPO3\CMS\Extbase\Mvc\Web\Request), Object(TYPO3\CMS\Extbase\Mvc\Web\Response))
#19 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/extbase/Classes/Core/Bootstrap.php(199): TYPO3\CMS\Extbase\Mvc\Web\FrontendRequestHandler->handleRequest()
#20 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/extbase/Classes/Core/Bootstrap.php(186): TYPO3\CMS\Extbase\Core\Bootstrap->handleRequest()
#21 [internal function]: TYPO3\CMS\Extbase\Core\Bootstrap->run('', Array)
#22 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(6341): call_user_func_array(Array, Array)
#23 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/UserContentObject.php(41): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->callUserFunction('TYPO3\\CMS\\Extba...', Array, '')
#24 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(820): TYPO3\CMS\Frontend\ContentObject\UserContentObject->render(Array)
#25 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(736): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->render(Object(TYPO3\CMS\Frontend\ContentObject\UserContentObject), Array)
#26 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/Controller/TypoScriptFrontendController.php(3538): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->cObjGetSingle('USER', Array)
#27 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/Controller/TypoScriptFrontendController.php(3500): TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->INTincScript_process(Array)
#28 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/Controller/TypoScriptFrontendController.php(3467): TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->recursivelyReplaceIntPlaceholdersInContent()
#29 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/Http/RequestHandler.php(226): TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->INTincScript()
#30 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/core/Classes/Core/Bootstrap.php(319): TYPO3\CMS\Frontend\Http\RequestHandler->handleRequest(Object(TYPO3\CMS\Core\Http\ServerRequest))
#31 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Classes/Http/Application.php(79): TYPO3\CMS\Core\Core\Bootstrap->handleRequest(Object(TYPO3\CMS\Core\Http\ServerRequest))
#32 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Resources/Private/Php/frontend.php(23): TYPO3\CMS\Frontend\Http\Application->run()
#33 /var/customers/webs/xxxxx/vendor/typo3/cms/typo3/sysext/frontend/Resources/Private/Php/frontend.php(24): {closure}()
#34 /var/customers/webs/xxxxx/vendor/typo3/cms/index.php(3): require('/var/customers/...')
#35 {main}