diff --git a/server/tga/sign_off/template_globals.py b/server/tga/sign_off/template_globals.py
index 73943d0..a7e73dc 100644
--- a/server/tga/sign_off/template_globals.py
+++ b/server/tga/sign_off/template_globals.py
@@ -86,7 +86,7 @@ def render_tag_list(label: str, values: List[str]):
 def render_featuremedia_image(item):
     featuremedia = item["associations"]["featuremedia"]
     image_url = featuremedia["renditions"]["viewImage"]["href"]
-    alt_text = featuremedia["alt_text"]
+    alt_text = featuremedia.get("alt_text") or featuremedia.get("description_text") or featuremedia.get("caption")
 
     return f"""
 <div class="sd-input sd-input--x-large sd-input--boxed-style sd-input--boxed-label">
diff --git a/server/tga/sign_off/utils.py b/server/tga/sign_off/utils.py
index 923be2f..7ee3afb 100644
--- a/server/tga/sign_off/utils.py
+++ b/server/tga/sign_off/utils.py
@@ -65,7 +65,7 @@ def _get_publish_sign_off_data(item: Dict[str, Any]) -> Optional[PublishSignOffD
                 sign_off["user_id"] = ObjectId(sign_off["user_id"])
 
             return publish_sign_off
-        else:
+        elif item["extra"]["publish_sign_off"].get("user_id"):
             # This is the legacy format (AuthorSignOffData), change it to PublishSignOffData
             author_sign_off: AuthorSignOffData = item["extra"]["publish_sign_off"]
             author_sign_off["user_id"] = ObjectId(author_sign_off["user_id"])
@@ -127,6 +127,8 @@ def modify_asset_urls(item, author_id: ObjectId):
     item["body_html"] = new_body_html
 
     for key, association in (item.get("associations") or {}).items():
+        if association is None:
+            continue
         for size_name, rendition in (association.get("renditions") or {}).items():
             rendition_href = rendition["href"]
             asset_filename = rendition_href[rendition_href.index(url_prefix) + url_prefix_len :]