[Résolu] Critical error on translated pages

Background of the issue:
I am trying to fix a critical error when opening translated pages on my website. Here is the link to a page where the issue can be seen: lien caché. Additionally, here's a video snapshot of the issue: lien caché.

Symptoms:
I expected to see the translated pages, but instead, I got a critical error.

Questions:
What could be causing the critical error on translated pages?
How can I resolve the critical error when opening translated pages?