Special characters for projects - checkboxes not appearing 1909

Hello,

We have an issue whilst building 1909 PS. The check boxes at the special characters for operative projects config which holds the special characters to define the length of the key for project coding are not appearing. I have attached a screenshot of the same. could you please throw some light in here?c7625535-109a-4394-8bb9-324ddc3530d5.jpeg