A fleet of Robo taxis in San Francisco suddenly stopped operating on Thursday night, which stopped traffic on the street and for a couple of hours until the company employees arrived and fixed the car. There was a Reddit post that featured a photo of the stalled driverless cabs at the corner of Gao and Fulton Streets. It was a Cruise car, which is a subsidiary of General Motors AV Subsidiary. They launched their commercial Robo taxi service in the city last week, and these rides feature no human safety drivers and are Geo-restricted to only certain streets.

The company did apologize for this incident in a statement and gave a little explanation for what caused this problem. A spokesperson said, “We had an issue earlier this week that caused some of our vehicles to cluster together. While it was resolved and no passengers were impacted, we apologize to anyone who was inconvenienced.”

The AV star, dubbed backed by GM, won the first driverless taxi permit in San Francisco, after which they began offering residents of the city Free Rides in February and after launching their paid passenger service on June 24th, There were a lot of customers who were very eager to share their thoughts on how the right went and there were mixed reviews. As one passenger noted that their cruise car took an unusually long route to get to their home, and another passenger seemed to have a more positive experience, even leaving a cash tip for the driverless car.

This appears to be the company’s first major stumbling block. At least four commercial services. There was another incident back in April which was quite funny as a cop stopped a cruise car for not having its headlights on and officers appeared unsure of how to proceed after discovering there was no human behind the wheel.