"Cannot connect to Steam network"

For my own future reference as much as anyone else's. The fix for this error is contained in this video:

Football Manager report

2019 Champions League Final

Manchester United 3 - 1 Real Madrid

MUFC goals: Shaw, Falcao, Bale
Real goal: Otavio

United team (4231)

De Gea
Danilo (Pique), Jones, Rojo, Shaw
Koke, Thiago (Herrera)
Bale, Januzaj, Munir (Di Maria)
Falcao