At Havana when you try to leave the port the only option available on fast travel is the Fort.
Also when you walk up to the port gates to go into the town the gates are locked ( closed padlock top left of screen).
Only way into town is quickly in and out of fort.
Going from town to Port works ok.
Also I have just managed to complete the quest without talking to the ill soldier behind the church ( was not there ) or the prison governor - which I think might be wrong. :? But the quest book updated and closed ok - except not all the entries were there.
Also when you walk up to the port gates to go into the town the gates are locked ( closed padlock top left of screen).
Only way into town is quickly in and out of fort.

Going from town to Port works ok.
Also I have just managed to complete the quest without talking to the ill soldier behind the church ( was not there ) or the prison governor - which I think might be wrong. :? But the quest book updated and closed ok - except not all the entries were there.