I can reproduce the issue. The View parameter is stored as a number in
the .gchart file. Previously, it was the views name.
diff Summary-new.gchart Summary-old.gchart
> @@ -1,7 +1,7 @@
> {
> "CHART":{
> "VERSION":"1",
> - "VIEW":"analysis",
> + "VIEW":"2",
> "TYPE":"42",
> "PROPERTIES":{
> "title":"Summary ",