403 error with “leave a reply”

Hi there,

I have two questions:

1. https://snipboard.io/KwjAyZ.jpg The 403 error pups up when I leave a reply or add a comment. How can I fix it?

2. https://snipboard.io/KwjAyZ.jpg Can i change the label “Staff” to other name?

Thank you so much!

The page I need help with: [log in to see the link]