Hyperdock (a windows manager for MacOS) has stopped working. Hyperdock has been broken since late 2018. Everyone tries removing, adding it again, deleting the preference, disabling and reenabling it. So, it seems the developers have given up.
The best alternative to Hyperdock that I’ve found is Magnet which cost about £0.99 – so hardly anything for the usability improvement that you get.
It basically just works. Hope that helps someone.