I'm running CiviCRM 5.11.0 in Wordpress 5.1.1. Currently, I'm not able to renew any membership in CiviCRM: Membership section of the selected profile > Renew membership. When I confirm renewal, the system gets stuck in saving screen forever and nothing is registered on the database.
I tested the renewal using a profile page in the frontend, for myself, and it worked. It's only in the backoffice (where I register 99% of membership renewals) where this happens. Contributions are working fine, it's not an issue of recording payment or the associated contribution.
Do you know what may be causing this issue and how to solve it?