Something went wrong, Entered PMCC does not exist in Excel file Z00035

Something went wrong, Entered PMCC does not exist in Excel file Z00035

Hi everyone can you kindly assist us regarding sending claims. I am using the assigned beacon portal link that was sent in our email then I cannot validate xml also membership inquiry, attached here the image of what is appearing when I try to do so. I also cannot open the previous Beacon portal. Kindly assist us please