MMH5.5 - Heroes of Might and Magic 5.5

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UPD: In the "Hammers of Fate" add-on, in mission 3.1, I approached the artifact shop, but it doesn't open 🙁. There's an error in the console: "Invalid artefact ID 120". In mission 2.5, the artifact shop also doesn't work.

I will answer on behalf of the respected representative, as this is a frequent question. You are installing a whole bunch of things in the mod, and to make it work correctly, you need to launch the game through the modified executable. In the files that you put in the data folder, there are scripts that mention various new things, such as new artifacts. The original executable doesn't know anything about new artifacts, etc. If you are not happy with the rebalanced AI, launch the game through MMH55Utility_64.exe. Or, better yet, wait a couple of weeks, and a patch for the campaigns will be released.