NEW YORK (PIX11) — The saying goes “there’s no such thing as a free lunch.” Grubhub offered that to New Yorkers Tuesday, but the perk wasn’t without complications.

“Real New Yorkers are joining us for free lunch,” the food delivery service tweeted Tuesday, also sharing a code for customers. The deal ran from 11 a.m. to 2 p.m.

Hungry residents were quick to take up the deal, but some experienced problems with the app’s interface.

“Well this was a cute idea,” one customer wrote, “but it’s 11:16 and your app has already crashed.”

Others said their orders were canceled after using the promotion. Some were able to place orders, but experienced delays.

“This is not going well,” another New Yorker wrote. “My order has been in the works for 2 hours and the restaurant is now ‘closed’ but keeps hanging up on my phone calls. I’m starving. The restaurant is probably on fire.”

GrubHub told BuzzFeed News that at times during the promotion, the app was averaging 6,000 orders per minute.

According to the company, that volume should have been expected. On Twitter, Grubhub wrote they “provided advance notice to our restaurant network” about the promotion.

“We are thankful for the incredible work they put forth today and are working to address any concerns they may have and optimize for future offers,” the tweet thread continued.