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Could you please tell me what the problem is?
Tribes of the East, version 3.1
This problem has been observed both in the original campaign (mission 2 for Zehir, after capturing the rebel castle) and now when downloading fan-made maps.
The problem: I cannot upgrade creatures if only alternative upgrades are available. That is, if I can recruit both regular and alternative units, I can upgrade them without any problems. For example, I can upgrade peasants into either one or the other.
However, if only the alternative upgrade is available (e.g., for Ruffians), I cannot upgrade peasants from the outer dwelling; I can only do it through the Fortress. The same applies to other creatures.
The inconvenience is that if I buy troops in the castle without upgrading them, I cannot upgrade them later, only through the Fortress or by dismissing them.