Fix IconFont ValueError
@@ -92,7 +92,7 @@ class IconPluginMixin(CascadePluginMixinBase):
if not hasattr(instance, '_cached_icon_font'):
try:
instance._cached_icon_font = IconFont.objects.get(id=instance.glossary['icon_font'])
- except (IconFont.DoesNotExist, KeyError):
+ except (IconFont.DoesNotExist, KeyError, ValueError):
instance._cached_icon_font = None
return instance._cached_icon_font
