Did I read that using rollback caused various errors in the game?
They just want to make sure you know you are using an undocumented feature. And, yes, rollback used unrestrictedly will break your game. However, the way it's implemented in the mod will minimize those issues to a point where it's as safe as can be.
Most importantly, the mod will not allow you to rollback accross internal state changes that would otherwise get lost.
If you want to be on the safe side, just use rollback to try something out, and make a save before so that you can load it and continue (this time without rollback). You will lose that possibility if you disabled rollback in the first place.
Also, it will be totally save to use rollback in the gallery, i.e. replay mode, which would also not be possible if you disabled it.
I myself use rollback and I just recently played through the whole game, from start to finish. It should be totally safe to use e.g. during animated scenes or isolated dialogs.