Cant create or modify new users in Versió 7.12.5

Suddently I am not able to create new users or modify the data for existing users. The save button when editing or creating a new suitecrm user simply does not do anything.
Any sugestion on why this could be happening or how to fix it??

I just found out that if I access Suitecrm using the english language, the functionality works correctly and I have no issues creating or modifying users.
But if I access using the Catalan language then it does not work

Then you can look for errors bring logged when using Catalan language.

For this kind of thing I suggest starting by looking at the browser’s developer console.