mc 1.15.2
forge-1.15.2-31.1.16
minecolonies-0.10.764-ALPHA-universal

please explain how to
RESEARCH BARRACKS

trying to build universtity 3:
builder alway ask for leather hat, if fulfill, ask again and again

Open GUI of university. Go to page 2, open combat page, get resoruces for research, click button, wait some time (hire a researcher)