Logo block not showing on pages

I need to use a block to show different logos on certain sections of my site.  Have turned of the default logo in the appearance setting for the theme but block will still not show.  If I move the block to other regions it shows no problem.

Can you help?

Hello,

By default, you can not added more block to logo region. So, you try to deacitve logo region then create new region instead.

Thank you.