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SparkySweets, there's a bug in your version; the starting script fails at some point, and not everything is initialized correctly. In the normal version, the computer players shouldn't be able to move; they don't even get a turn. (The pop-up windows are enemy heroes that should have been standing still like statues, and they're clicking on all sorts of buildings during their turn). I'll try to figure something out now. If you're willing to cooperate, we can debug it remotely sometime. There's no point in continuing to play right now. :(
Regarding the educational center: at the very beginning, there are already plenty of things to spend money on, but a little later, you can buy those skills that have a very low chance of appearing (I got Chaos Magic this way, for example).
I found a bug: there's a constant called CREATURES_COUNT in the game. According to my calculations, it should be taken from the common.lua game file, which contains all the creatures from the original game, totaling 180. In your version, it's equal to 1000 (presumably due to some mods that add creatures). I'll try to hardcode it into the starting script and update the download link.
In general, the problem is that there's a lot of specific code on the map that's tied to the original game. Hence the suggestion to play the "clean" version.
Update: I've updated the link in the first post. If the console is enabled (I recommend enabling it), open it at the start of the map and make sure there are no red errors and that a green message appears saying that everything is okay (on "Warrior" difficulty, this should happen about a minute after the start, and on other difficulties, after 2-3 minutes)