Problem with update

Hello,

I made all update and I have a problem with my widget (in left) a little menu is not sticky anymore.

https://www.espace-musculation.com/squat-complet-profond-verite.html :

Liens utiles :
Débuter la musculation
Conseils entra?nement
Méthode musculation
Physiologie musculaire
Le guide des hormones
Prévention blessures
Le cardio-Training
Anatomie musculaire
Outil calcul RM

before update is was ok . I try all options, but nothing works