Marc Anthony Worldwide Virtual Concert Fails Due to Technical Problems

Marc Anthony fans just learned a hard lesson about virtual concerts ... they're just not the same as the OG.

Marc's fans were none too pleased when they paid for such a concert Saturday, but there were massive technical problems. Some of them waited 3 hours before Marc finally pulled the plug.

The concert was supposed to stream out to folks in 85 countries, but there wasn't a frame of video to show for it.

Marc posted his apology ... “I am deeply sorry for this technology failure that unfortunately was out of our control. You can rest assured that I am doing everything in my power to make sure that the people that spent their hard-earned money have the opportunity to see the show as soon as possible and will make it right for you all.”