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Hi everyone, I have tried to update a prestashop from 1.7.2 to 1.7.8 4 times. The first and the second time I did it using the module 1 click update and I had this error: Failed to start the session because headers have already been sent by "/homepages/16/d868063837/htdocs/public_html/website/override/classes/Link.php" at line 245. I have checked that document and I see it is related to a module named ps it clean urls, I deactivated, activated it again and also reseted it. The third and fourth time I did update it manually and I had this error: Error reading XML: root element not found. Ubication: mywebsite.com/install/upgrade/upgrade.php on line 221 (1/1) ContextErrorException Notice: Trying to get property 'id_category_default' of non-object in ProductController.php line 1245 at ProductControllerCore->getBreadcrumbLinks()in FrontController.php line 1736 at FrontControllerCore->getBreadcrumb()in FrontController.php line 533 at FrontControllerCore->assignGeneralPurposeVariables()in FrontController.php line 590 at FrontControllerCore->initContent()in ProductController.php line 417 at ProductControllerCore->initContent()in Controller.php line 306 at ControllerCore->run()in Dispatcher.php line 525 at DispatcherCore->dispatch()in index.php line 28 Php version is 7.4. I would really appreciate any clue or any recommendation to solve any of these situations. Thanks for reading and regards