I am trying to access or update my personal information on Amazon, but the page is not working and it will not let me enter or save my information. Please help me fix this issue.

am trying to complete my personal information on the Amazon website, but I am unable to enter or save my information. The page does not accept the information I enter, so I cannot complete this section. I have tried using Mozilla Firefox, but the problem is still happening. Could you please help me fix this issue or tell me what I need to do? Thank you.