@OliverRodriguesthanks a lot for response
is "myaccount" an entity form for the contact entity? if yes, is the "record source type" set to Current Portal User? - myaccount is an entity form for account entity
if your entity form is pointing to a different entity, by the URL it explains why you are getting the error message "your record cannot be found"
basically if you have a web page with an entity form (edit), the Portals is expecting an existing record GUID for your entity
but according to your URL, you don't have any ID there.. that's why you are getting the error
how to you get to that page? is there an Entity List before reaching there? or a direct link?
- I get through that page as shown below i should switch between business and personal

sorry for all the questions.. I am just trying to understand a bit more your scenario in order to help - No problem @OliverRodrigues I'm glad that you are trying to help me out
Best regards,
Sumaira Noor