Suitecrm 8.2.3 reuqired field validation is not working

I have installed Suitecrm 8.2.3.
In Leads, Opportunity and some other modules the required field validation is not working.
I have updated the required field for some fields from the studio. But when I click save, the form is saved without showing an error message for the required field ( empty validation).

Hello, have you managed to find a solution? I’m experiencing the same issue. I’m trying to create a new lead, and when I fill out the form, leaving two mandatory fields (they are dropdowns, not text fields) empty, it still saves without showing an error message, when it shouldn’t be able to save and should display that the fields are mandatory