Hi, this same thing happened to me when updating from 16.2 to 16.3.
The error message displayed on the web browser after is: “There has been a critical error on this website.”
My host said these are what’s showing in the log:
#0 /public_html/wp-content/plugins/wordpress-seo/src/generated/container.php(914): Yoast\WP\SEO\Generated\Cached_Container->getImageHelper4Service()
#1 /public_html/wp-content/plugins/wordpress-seo/src/generated/container.php(847): Yoast\WP\SEO\Generated\Cached_Container->getIndexableHomePageBuilderService()
#2 /public_html/wp-content/plugins/wordpress-seo/src/generated/container.php(3172): Yoast\WP\SEO\Generated\Cached_Container->getIndexableBuilderService()
#3 /public_html/wp-content/plugins/wordpress-seo/src/generated/container.php(1821): Yoast\WP\SEO\Generated\Cached_Container->getIndexableRepositoryService()
#4 /public_html/wp-content/plugins/wordpress-seo/src/generated/container.php on line 2137