FYI – I just got around this by uninstalling the plugin and using my page itself to generate the code in the settings. There’s a ‘Setup chat on my website’ button in the settings area that spits out some code to install on your site, does the same thing. Plugin only acts as a helper of sorts.
Having exactly the same issue and came here to report it. I can’t complete the last stage of the connection. The ‘Finish’ button is grey’d out. I had just updated the plugin to the latest version too before I setup, so it possibly is to do with newest version>
