[JKT]

It means that one or more of the sites you have in your snapshot is causing OmniWeb to crash, not that the snapshot feature doesn't work per se. I have been using snapshots for several years now and, yes, it does work.

For the snapshot that is crashing, try to identify the tab(s) that are causing the crash and remove them from the snapshot. Report which sites are causing the crash to OmniGroup.