General Motors’ Cruise has hit a speed bump, forced to recall its robotaxis just a day after getting authorization to operate them in California.

Like many companies, GM and Cruise are racing to develop autonomous vehicle capabilities. Cruise scored an early victory over its rivals, becoming the first to receive the green light to operate in California.

According to TheStreet, however, the victory was short-lived. Just a day after receiving its authorization, a Cruise robotaxi was involved in an accident in which its autonomous systems were to blame.

The company “is recalling certain automated driving systems (ADS),” according to documents filed with the National High Traffic Safety Administration (NHTSA). “The software may, in certain circumstances when making an unprotected left, cause the ADS to incorrectly predict another vehicle’s path or be insufficiently reactive to the sudden path change of a road user.”

The news is a major setback for the autonomous vehicle company and further illustrates the challenges involved in making autonomous driving a reality.