Upgrade to 8.2.3: Activating ps_checkout, bricks my shop (front)

[spitfire00]

Hi upgraded my shop from 1.7.8.8 to 8.2.1, using Upgrade Assistant.

All went OK.

BUT When I activated the module Prestashop Checkout, it bricks my shop (frontoffice). It gives this error on front, backoffice works fine:

Fatal error: Uncaught PrestaShop\PrestaShop\Core\Exception\ContainerNotFoundException: Kernel Container is not available in /home/picanty/8/src/Adapter/ContainerFinder.php:77 Stack trace: #0 /home/picanty/8/classes/module/Module.php(1702): PrestaShop\PrestaShop\Adapter\ContainerFinder->getContainer() #1 /home/picanty/8/classes/module/Module.php(1691): ModuleCore::getModuleRepository() #2 /home/picanty/8/classes/Hook.php(884): ModuleCore::getNativeModuleList() #3 /home/picanty/8/classes/Dispatcher.php(606): HookCore::exec('moduleRoutes', Array, NULL, true, false) #4 /home/picanty/8/classes/Dispatcher.php(243): DispatcherCore->loadRoutes() #5 /home/picanty/8/classes/Dispatcher.php(201): DispatcherCore->__construct(Object(Symfony\Component\HttpFoundation\Request)) #6 /home/picanty/8/index.php(28): DispatcherCore::getInstance() #7 {main} thrown in /home/picanty/8/src/Adapter/ContainerFinder.php on line 77

If I desactive the ps_checkout module the shop comes to live. If I activate it bricks.

I already uninstall and re-install ps_mbo and ps_checkout several times, but I dont know what to do more. I am trying to fix this in some attemps for almost 2 months. Can you help? How should I try?