I can confirm I have the same issue on my side.
It seems to happen only when you set a "Field items Wrapper Tag". The summary presented in the Manage Display page is empty and the error mentionned by liliplanet appears.
Issue is here:
'fences_field_wrapper_tag' => t('Field items wrapper tag: %field_items_wrapper_tag', ['%field_items_wrapper_tag' => $fencesSettings['fences_field_items_wrapper_tag']]),
'fences_field_wrapper_classes' => t('Field items wrapper classes: %field_items_wrapper_classes', ['%field_items_wrapper_classes' => $fencesSettings['fences_field_items_wrapper_classes']]),We are missing "items" for items_wrapper_tag and items_wrapper_classes in array keys.
Running composer dump-autoload -o seems to help.
From what I see on doctrine/deprecations, they moved source location from lib/ to src/
I can confirm that I also updated some modules few minutes ago and received the same error with WSOD on multiple pages.
It appears indeed that doctrine/deprecations 1.1.4 is the problem.
Downgrading to 1.1.3 error disappears.
I also have the same issue on the webform list page "admin/structure/webform" where I have 3 different webforms, but in very particular browser height and depending on the page content, our first webform is inaccessible/hidden on scroll.
Removing the overflow: auto; also seems to solve the issue.