Magento 2 crashes every time I try to Enable or Disable any modules

Question

I have Magento 2.3.3 and it's being hosted on MageMojo Stratus.

Every time I try to install, enable, or disable any modules, the front-end will work fine, but I get an unrecoverable error in the admin panel:

<b>Fatal error</b>:  Uncaught Error: Call to a member function getNext() on null in /srv/public_html/generated/code/Magento/User/Model/User/Interceptor.php:529
Stack trace:
#0 /srv/public_html/vendor/magento/module-backend/Model/Locale/Manager.php(96): Magento\User\Model\User\Interceptor-&gt;getInterfaceLocale()
#1 /srv/public_html/vendor/magento/module-backend/Model/Locale/Resolver.php(77): Magento\Backend\Model\Locale\Manager-&gt;getUserInterfaceLocale()
#2 /srv/public_html/vendor/magento/framework/Locale/Resolver.php(83): Magento\Backend\Model\Locale\Resolver-&gt;setLocale(NULL)
#3 /srv/public_html/vendor/magento/module-backend/Model/Locale/Resolver.php(60): Magento\Framework\Locale\Resolver-&gt;__construct(Object(Magento\Framework\App\Config), 'general/locale/...', 'store', NULL)
#4 /srv/public_html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(116): Magento\Backend\Model\Locale\Resolver-&gt;__construct(Object(Magento\Framework\App\Config), 'general/locale/...', 'store', Object(Magento\Backend\Model\Session\Interceptor) in <b>/srv/public_html/generated/code/Magento/User/Model/User/Interceptor.php</b> on line <b>529</b><br />

I've tried the well known following steps and every possible variation I could think of:

magento maintenance:enable
magento cache:disable
rm -rf generated/ var/view_preprocessed/ var/composer_home/cache/ var/cache/ var/page_cache/
magento setup:upgrade
composer install
magento setup:di:compile
magento setup:static-content:deploy -f
magento indexer:reindex
magento cache:flush
magento cache:enable
magento maintenance:disable

Answer 1

It seems that the issue was 2-fold:

1. To properly remove all generated content the command should be:

rm -rf generated/* var/di/* var/cache/* var/page_cache/* var/view_preprocessed/* var/composer_home/cache/* pub/static/*

2. On MageMojo's Mojo Stratus hosting, you need to simultaneously clear Varnish cache, Redis cache, PHP OP-Cache, and AWS CloudFront storage. There is a helper cli tool present on the server you can use:

...
php bin/magento cache:flush
/usr/share/stratus/cli cache.all.clear