Board Thread:Support Requests - Designing Your Wiki/@comment-39346356-20200308124333/@comment-1038387-20200308131323

When it says incorrect file type, the "16 by 16 pixels" is not the part of the Help page that you should be focusing on.

Have you made it an .ico file? If the image you added here is what you want... that's far too big and detailed for a favicon. That line of text is not going to be visible. Are you sure you want to use that as the favicon?