LOADING OF A MODIFIED OBB FILE WAS SUCCESSFUL....KINDA (SEE BELOW) :)
I found an interesting byte in the original OBB file. It is located at offset 0x0000001D and has a default value of 00.
If this single byte is modified from its orig...
i have the same problem, it may have to do with this:
MarketSession.class: private static final String URL_LOGIN = "https://www.google.com/accounts/ClientLogin";
web output: Error=BadAuthentication
Updated script to v0.5
Script Link: gtavc-multi-mod-tool-0.5-pre-alpha.sh
Multi Mod Tool Link: gtavc-multi-mod-tool-0.5-pre-alpha.zip
Another stab at it relating to Java source.
I think this may be the right direction along with the modified OBB file current theories.
The method is "localHasGameData()" and it comes from WarMedia.class.
With all due respect to the original author, I have repackaged fiddler with a T-Mobile Bypass User Agent already in place. I have created a website and host it here. Props to the OP for this trick.