This issue is most likely being caused by some 3rd party plugin conflict with our AJAX page transitions.
When page transitions are turned on, the header and the footer are not reloaded, in fact only the content gets reloaded. This can cause issues with certain plugins, as they demand their scripts to be loaded in the header or the footer, and in cases like this one, this is simply not happening. If you happen to experience this issue later on while developing your website, note that the first thing you should try is turning off (smooth) page transitions.
Page transitions can be turned off from → Theme Options > General > Settings or for some specific page within General Page settings.
