fix: Error loading share link view.

closes #1143

app/scenes/Document/KeyedDocument.js

@@ -9,13 +9,13 @@ class KeyedDocument extends React.Component<*> {
   }
 
   render() {
-    const { match } = this.props;
+    const { documentSlug } = this.props.match.params;
 
     // the urlId portion of the url does not include the slugified title
     // we only want to force a re-mount of the document component when the
     // document changes, not when the title does so only this portion is used
     // for the key.
-    const urlId = match.params.documentSlug.split('-')[1];
+    const urlId = documentSlug ? documentSlug.split('-')[1] : undefined;
 
     return <DataLoader key={urlId} {...this.props} />;
   }