kiri: Changing schematic sheet fails

When attempting to open another sheet on a hierarchical design the firefox dev tools claims:

Uncaught ReferenceError: change_page_onclick is not defined
    onclick http://127.0.0.1:8080/web/index.html:1

It appears all the svg files needed for the diffs exist in the sub directories of .kiri (i.e. they plotted just fine), but the html or js is missing something.