Known issueFixUpdated · 11 replies on Steam
Mafia Queens: Error (Workarounds)
Short answer
Suggested fix (unconfirmed): Temporarily disable your antivirus software or add the game to its exclusion list. Alternatively, use a stable VPN while launching the game.
The problem
loads to 50% then stops
What players suggest
Regarding the loading issue please kindly try to launch the game with a stable VPN.
Re-installed and tried again. Even ensured that my VPN was active. Still getting warning that site is unsafe.
Did this work for you?
Source: original Steam Community discussion. Quotes are shortened; all credit goes to the posters.