When you set a Make content available even with missing translations to false on clanding page content type class, you face errors during translation.

Steps to reproduce:

• install 3.3
• In the admin, create two additional languages, for instance: ger-DE, eng-US
• edit landingPage ContentType class and Make content available even with missing translations to false
• use the config below on ezplatform.yaml
• create a new landing page (ger-DE) and add at least one blocks  and publish it
• click on (site -> view location on us-site => Exception -> location not found
• click on add new translation:  frozen white page

Config

# Siteaccess configuration, with one siteaccess per default
siteaccess:
    list: [site, us-site, de-site]
    groups:
        site_group: [site, us-site, de-site]
    default_siteaccess: site

system:
    default:

    site:
        languages: [eng-GB]

    de-site:
        languages: [ ger-DE, eng-GB ]

    us-site:
        languages: [ eng-US ]

    site_group:
        translation_siteaccesses: [ site, us-site, de-site ]

    admin_group:
        languages: [eng-GB, ger-DE, eng-US]
        page_builder:
            siteaccess_list: [site, us-site, de-site]