When McDonald’s advertised free McNugget Caviar Kits for one day only, many customers thought they had their Valentine’s Day gift in the bag.

That is, until a tidal wave of customers flocked to the giveaway website on Feb. 10, cleaning out the limited supply almost instantly.

The kits dropped at 11 a.m. ET on Feb. 10, exclusively at McNuggetCaviar.com, and many fast-food fans took to social media to express their frustration when they were unsuccessful in their attempt to score one of the coveted kits.

McDonald's McNugget Caviar Kit.
McDonald’s McNugget Caviar Kit.McDonald’s

“I think this was a scam. It loaded to a blank white page. Then refreshed 3 min later to a ‘sold out’ page,” one Instagram user commented on McDonald’s post.

“How is it sold out????? I had the website on three different devices. Saw the countdown. How is that even possible?” another wrote.

Many social media users commiserated with each other and said they experienced “an immediate crash” when they tried to access the website.

“Your caviar giveaway was a disaster. Five minutes of a blank white screen and then sold out? Did you not expect to have your site overload and possibly crash?” one wrote.

After the kits sold out, McDonald’s updated its website with the following message: “Unfortunately, our McNugget Caviar was everyone’s Valentine this year, and has flown off the shelves. However, you can also elevate your McNuggets with our sweet and spicy Hot Honey sauce for a limited time. Try it today at your local McDonald’s.”

When the fast-food chain first announced the giveaway, the company didn’t specify how many kits it was releasing but encouraged customers to “act fast.”

The McNugget Caviar Kits included a 1-ounce tin of McNugget Caviar, crème fraîche, a mother-of-pearl caviar spoon and a $25 McDonald’s gift card.

McDonald’s partnered with Paramount Caviar to offer the kits, which feature Baerii Sturgeon caviar, for free.

“McNugget Caviar was designed as a limited-edition drop, offered free of charge,” a McDonald’s spokesperson tells TODAY.com. “The fan excitement was so real it caused the kits to sell out very quickly, leading some to experience site disruptions. We look forward to bringing more ways for fans to enjoy our limited time drops in the future.