Hello! I'm stumped and getting frustrated with GTA IV lol , so I've come here to get help. I ran the diagnostic tool , all checked out fine except the log part (log attached plus screen shot). Legit copy of game , from steam store. Win 10 pro , 8gb ram with an A10 7850k APU. Any additional info needed please let me know, I'll do my best :)

Diagnostics_14.11.2015_11_28_30.log

Looking over the log this seems to be holding me up I believe.

[INFO - 3:15:59 PM] [Log] Started

	[INFO - 3:15:59 PM] [Main] Main: Initializing...

	[INFO - 3:16:00 PM] [Main] Main: LCPDFR Engine (C) 2011-2013 LMS

	[INFO - 3:16:00 PM] [Main] Main: DO NOT USE THIS WITHOUT PERMISSION. YOU MAY NOT SHARE, MODIFY OR DECOMPILE THIS FILE.

	[INFO - 3:16:00 PM] [PluginManager] Initialize: Loading custom plugins

	[WARNING - 3:16:00 PM] [Settings] ReadSettings: Invalid entry 

	[INFO - 3:16:00 PM] [Settings] ReadSettings: Suspect transporter POLICE

	[INFO - 3:16:00 PM] [Settings] ReadSettings: Suspect transporter POLICE2

	[INFO - 3:16:00 PM] [Settings] ReadSettings: Suspect transporter PSTOCKADE

	[WARNING - 3:16:00 PM] [Settings] ReadSettings: Invalid entry 

	[INFO - 3:16:00 PM] [Plugin.Main] Changing language to en-US

	[INFO - 3:16:00 PM] [Main] Main: Initializing done

	[INFO - 3:16:00 PM] [ServerCommunication] InitializeConnection: Internet connection available

	[INFO - 3:16:00 PM] [ServerCommunication] InitializeConnection: Public IP Address is: *edited*

	[INFO - 3:16:02 PM] [ServerCommunication] InitializeConnection: Found configuration for the masterserver, going to use API server v2.lcpdfr.onlineservices.g17media.com

	[INFO - 3:16:02 PM] [ServerCommunication] InitializeConnection: Establishing session with the LCPDFR server...

	[WARNING - 3:16:02 PM] [ServerCommunication] InitializeConnection: Failed to connect to the LCPDFR server (The remote server returned an error: (502) Bad Gateway.). Multiplayer is deactivated

	[INFO - 3:16:03 PM] [Authentication] Authentication: Server not available, trying to authenticate offline

	[ERROR - 3:16:03 PM] [Authentication] Authentication: Authentication failed. Couldn't reach server or no valid lease available

	[INFO - 3:16:03 PM] [Authentication] Authentication: User is in offline mode

	[INFO - 3:16:03 PM] [NetworkManager] NetworkManager: In network session: False Is host: False

Anyone know something to try?

Same problem here

Same problem...