Hey there everyone! 0.4 is being re-released, due to a change in the UI for 0AD's re-release of 0.23 that completely broke and prevented multiplayer matches. Unfortunately, the nature of their change requires everyone to take an extra step to get the mod to run properly if you have had Hyrule Conquest installed before, namely you have to manually delete a configuration folder in C:\Users\User\AppData\Roaming\0ad folder. Exodarion has a handy tutorial below on how to pull that off, as well as general installation instructions for those that have never installed the game before. Deleting the configuration file is timestamped at 7:45
I apologize for this extra step needed, it should be unnecessary for future versions of Hyrule Conquest.