Tactics example is incorrect

Has anyone actually even checked the analysis of the position as provided in the "tactics" section? Because the final analysis is wrong, though I like the "collaboration" topic.

I was bored a little and didn't want to do tests from month 4, where I'm at, so I looked ahead because I just ate and wanted to do light stuff. Observe the position and it's evaluation. It's dead equal. The author missed a refutation. He should have checked with an engine. He makes much more mistakes I noticed. I'll post one about double pawns as well. But first this one.

The author expected Bg5 to retreat, so that white could go on with Nxd5. But black has a simple defense and then the attack is over.