One more try to correctly link to a static image [ci skip].

docs/source/_templates/breadcrumbs.html

@@ -40,7 +40,7 @@
     </li>
     <li class="wy-breadcrumbs-aside">
       <a href="https://jupyter.org/documentation">
-        <img src="{{ source_url_prefix }}/_static/jupyter_logo.svg"></img>
+        <img src="{{ pathto('_static/jupyter_logo.svg', 1) }}"></img>
         {{ _('Jupyter') }}
       </a>
       &vert;