Facebook basic page information (name) not being saved

Question

When trying to edit the basic information for the display name of page (not the vanity url) the information does not get saved.

I am trying to change the name from "FirstName LastName" to "fila"

On save, the page results in a blank page and the information isn't saved.

Web Inspector shows that the name field is sent in the form data,

Form data
profile_super_category:1013  
...  
pageid:name:fila  
...

but nothing in my eyes comes out as any error message or the response.

The page is unpublished.

Why is this happening?

Answer 1

I searched various sites for information to resolve this and most seem to point to clearing the IP access activity in security settings. Clearing out all devices and activity stil resulted in no changes in the page.

I ended up adding one extra character to the name "afila" and after that the changes were saved.

It seems Facebook applies the 5 letter username rule to display names although it is implicitly implied by the silent fail with the blank page.

So in order to change the display name of the page, the display name must be at least 5 characters. I was able to successfully change other items on the page after doing this.