Hi Alex,It doesn't look like you are referencing the AccordionContainer module. This should fix the issue.
Alex,this is a weird one. After I added the following code to one of your panes on the right the basemap gallery worked:<div id="basemapGallery"></div>After that I closed the browser window and reopened your link and all the sudden your basemap started working.Tim
<div id="basemapGallery"></div>
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