When I select a content type (of any kind), the search gives me a sersol page with a “service unavailable error”. Any chance you have any insights into this?
I noticed that unchecking the "Only show items in my library's catalog" checkbox wasn't removing that limiter from the generated form markup.
When I changed the quoting around "Library Catalog", in line 32 in index.html, from " to literal double quotes, unchecking this limiter in the search generator worked. The resulting form appears to output valid searches which Summon correctly interprets.