500 error on a subject page

[saracarl]

Getty is getting a 500 error going to this page:
https://fromthepage.com/gri/stendahl-letters-qc/article/32081279

this is the error:

F, [2024-04-11T21:13:25.224085 #18042] FATAL -- :
ActionView::Template::Error (undefined method `title' for nil:NilClass):
19: -@article.target_article_links.each do |link|
20: li
21: =svg_symbol '#icon-page', class: 'icon'
22: =link_to link.source_article.title, collection_article_show_path(@collection.owner, @collection, link.source_article.id)
23: ==" — #{link.display_text}"

app/views/article/_article_links.html.slim:22
app/views/article/_article_links.html.slim:19
app/views/article/show.html.slim:42
app/controllers/application_controller.rb:64:in `switch_locale'

[benwbrum]

Duplicate of #3993 -- this should be a higher priority issue, as it is happening frequently.