Blank content when clicking on "View Node Link Detailed Info"

From the node's page of a Cisco 3800 device with several interfaces and links, if I click on "View Node Link Detailed Info", the page is blank (I can only see the bootstrap header and the main toolbar, but that's it).

An exception is thrown but not displayed (check the attached web.log).

The customer who reported the problem said that if the section that retrieves and display the CDP links is removed from element/linkednode.jsp, the page is displayed.