“Warlock/Clan Leader.” No income is generated from mines.

Something unpleasant happened; maybe someone knows what it is...? I have a licensed copy of Heroes 5 at home, with patch 1.1 installed, downloaded from this site. The problem is this: starting from the fourth campaign, in the first chapter "Warlock - Clan Leader," around the second or third week, the income from all my mines simply stopped being calculated, and, moreover, the city buildings also stopped generating income((( As a result, I managed to reach the maximum level in about 2 weeks, but, of course, by the time of the tournament, I was practically without an army! There is no money in the treasury, and no resources to sell((( Guys, does anyone know what the problem is and how to fix it???