Logi in mete disappereared

Hi my log in link has disappeared from my right panel. I have two blogs and post the same way, haven’t done anything different yet my log in link and others in the same cluster, have disappeared.

I have compareded the php code of each and it seems the same, although I have but a very rudimentary grasp of code, every line is the same.

Anybody knows what could be going on?

Weems