Snapshot 2.2 is a version released in August 2016, but was never uploaded here.
Snapshot 2.2 is the final version built upon Snapshot 2 and Snapshot 2.1. It fixes a lot of bugs, and improves a lot of things.
The next release, Snapshot 3 will be the final snapshot version and should be pretty much bug free. But for now, you can play this version.
For any bugs, please visit the GTAForums thread (http://gtaforums.com/topic/776561-wipbetasa-gta-underground-mod-discussion/page-404), the bug tracker (bugs.gta-underground.eu.org), or even the official forum (forum.gta-underground.eu.org)