mqhd signin rejected userid/password incorrect

macos 10.13 mqdh 2.41.

only mqhd that will start on my mac. any version of mqhd from 2.50 and forward posts a big blank white page at startup.

each attempt to login @ mqhd 2.41 rejects useris/password.

userid/password confirmed at meta.com

please confirm that this is another meta deadend.