Change render_format to render

netbox/templates/dcim/inc/rack_elevation.html

@@ -8,6 +8,6 @@
 
 <div class="rack_frame">
 
-  <object data="{% url 'dcim-api:rack-elevation' pk=rack.pk %}?face={{face}}&render_format=svg"></object>
+  <object data="{% url 'dcim-api:rack-elevation' pk=rack.pk %}?face={{face}}&render=svg"></object>
 
 </div>