Wagtail localize 'NoneType' object has no attribute 'block' - wagtail

Question

When trying to translate my homepage with wagtail-localize, I get the error:
AttributeError at /admin/localize/submit/page/3/
'NoneType' object has no attribute 'block'
I copied my homepage and tested. I noted that some embed blocks were blank and added a value. I could translate the copy. However when I did the same on the homepage, I had the same error message.
I then deleted fields from my homepage to check which is the problematic entry. this message keeps appearing even when my homepage is empty and I try to translate only the current page (i.e. without the children)
I also deleted my previous translated homepage and recreated and new one. The error persists.
I don't really get what to do next and would highly appreciate any input on the issue.
the traceback prints:
Environment:
Request Method: POST
Request URL: https://www.fommes.org/admin/localize/submit/page/3/
Django Version: 4.0.5
Python Version: 3.9.5
Installed Applications:
['search',
'cms',
'fictionary',
'streams',
'site_settings',
'mangos',
'wagtail_localize',
'wagtail_localize.locales',
'wagtail.contrib.forms',
'wagtail.contrib.redirects',
'wagtail.embeds',
'wagtail.sites',
'wagtail.users',
'wagtail.snippets',
'wagtail.documents',
'wagtail.images',
'wagtail.search',
'wagtail.admin',
'wagtail',
'wagtail.contrib.routable_page',
'wagtail.contrib.settings',
'wagtail.contrib.table_block',
'wagtail_link_block',
'wagtailmarkdown',
'wagtail.contrib.sitemaps',
'django.contrib.sitemaps',
'modelcluster',
'taggit',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.sites',
'userauth',
'django_countries',
'allauth',
'allauth.account',
'allauth.socialaccount',
'django_comments_xtd',
'django_comments',
'widget_tweaks',
'django_extensions',
'compressor',
'dbbackup',
'wagtailcodeblock',
'captcha',
'wagtailcaptcha',
'wagtailfontawesome',
'django_jsonfield_backport']
Installed Middleware:
['django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.middleware.locale.LocaleMiddleware',
'wagtail.contrib.redirects.middleware.RedirectMiddleware']
Traceback (most recent call last):
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/django/core/handlers/base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/django/views/decorators/cache.py", line 62, in _wrapped_view_func
response = view_func(request, *args, **kwargs)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail/admin/urls/__init__.py", line 161, in wrapper
return view_func(request, *args, **kwargs)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail/admin/auth.py", line 182, in decorated_view
response = view_func(request, *args, **kwargs)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/django/views/generic/base.py", line 84, in view
return self.dispatch(request, *args, **kwargs)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/views/submit_translations.py", line 175, in dispatch
return super().dispatch(request, *args, **kwargs)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/django/views/generic/base.py", line 119, in dispatch
return handler(request, *args, **kwargs)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/views/submit_translations.py", line 119, in post
return self.form_valid(form)
File "/usr/local/lib/python3.9/contextlib.py", line 79, in inner
return func(*args, **kwds)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/views/submit_translations.py", line 126, in form_valid
translate_object(
File "/usr/local/lib/python3.9/contextlib.py", line 79, in inner
return func(*args, **kwds)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/operations.py", line 90, in translate_object
translator.create_translations(instance)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/operations.py", line 79, in create_translations
translation.save_target(user=self.user, publish=publish)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/models.py", line 1334, in save_target
self.source.create_or_update_translation(
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/models.py", line 763, in create_or_update_translation
ingest_segments(original, translation, self.locale, locale, segments)
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/segments/ingest.py", line 268, in ingest_segments
StreamFieldSegmentsWriter(
File "/home/teki/.virtualenvs/fommenv/lib/python3.9/site-packages/wagtail_localize/segments/ingest.py", line 235, in handle_stream_block
block.value = self.handle_block(block.block, block.value, segments)
Exception Type: AttributeError at /admin/localize/submit/page/3/
Exception Value: 'NoneType' object has no attribute 'block'