LONDON — Uber’s chief executive, Dara Khosrowshahi, apologized in an open letter on Monday for the company’s “mistakes,” after the transport authority for London said last week that it would not renew the ride-hailing service’s license to operate in the city.

“While Uber has revolutionized the way people move in cities around the world, it’s equally true that we’ve got things wrong along the way,” Mr. Khosrowshahi wrote. “On behalf of everyone at Uber globally, I apologize for the mistakes we’ve made.”

The statement did not specify what, exactly, Uber was apologizing for, but the conciliatory tone represented a stark change for a company that, under its previous chief executive, Travis Kalanick, was better known for its aggressive approach from the get-go.

Uber intends to appeal the decision last Friday by Transport for London, a move that would prevent the company from doing business in its biggest European market, and it will be allowed to continue to operate during the appeals process. The company says it has 40,000 drivers in London and 3.5 million customers who use the service at least once every three months.