Hello,
Can you please post a screenshot like in the other post, of your jmx.password file Properties > Security tab?
If you are a domain user/admin that was not added to the local "Administrators" group, then it should show that you do not have read access to the file.
If it shows any additional users/groups/system permissions, except for "%HOSTNAME%\Administrators" (where %HOSTNAME% is your system's hostname, and Administrators will be different depending on the OS language), then please completely remove those permissions. Only %HOSTNAME%\Administrators group should have any permissions (Full Control).