You CAN Save Right Now is a simple mod that allows you to save at ANY time. It will work for both offline and online modes of the game. You can try to save at any time, but whether it will fail or not is out of my reach as of now because the function handling that is native and untouchable for now.

Installation:

If you didn't already, install (or update) Redscript. The extension can be found in the download section of this application.

Download and extract the You CAN Save Right Now mod from here.

The extension will work for both offline and online modes of the game.