Keep the old link if organization_website is blank

app/templates/app/base.html

@@ -93,7 +93,7 @@
                 </button>
                 {% block navbar-top-links %}{% endblock %}
             
-                {% if '/public/task/ in request.path %}
+                {% if '/public/task/' in request.path and SETTINGS.organization_website %}
                     <a class="navbar-brand" href="{{ SETTINGS.organization_website }}"><img src="{% settings_image_url 'app_logo_36' %}" alt="{{ SETTINGS.app_name }}" /></a>
                     <a class="navbar-link" href="{{ SETTINGS.organization_website }}"><p class="navbar-text">{{ SETTINGS.app_name }}</p></a>
                 {% else %}