When I clicked the Help > Key Commands link in the latest (Windows) version of Dorico, it gives the attached (erroneous) localhost menu rather than activating the key as it did in past versions.
Are you running any firewall or browser extension software that could be preventing this from working properly on your computer? There haven’t been any changes to the Dorico web helper component recently, and this is still working properly for me.
I’ll have to check. AFAIK I have not changed or upgraded any firewall/browser settings recently.