CHICAGO (CBS) — Normal service has resumed for Divvy Bikes systems, after a computer glitch left people unable to rent the ubiquitous blue bikes for nearly 12 hours.

Divvy said there was a problem with an overnight update to their system, starting around 11 p.m. Thursday, preventing Divvy members and people trying to purchase temporary passes unable to use kiosks, mobile apps, or key fobs to rent bikes.

Normally, the company’s computer updates do not affect users’ ability to rent bikes, but Divvy faced “some larger service issues related to this update,” the company said in a Twitter post.

Some confused Divvy riders thought perhaps they couldn’t get bikes loose because of the temperatures.

READ MORE: Man Shot On CTA Bus In Irving Park

“When it gets cold, shake it and it works,” Erika Edmonson said. “I’ve been riding, I don’t know, two or three years. I’ve never seen this happen.”

Riders went from one bike to another, hoping to get one that worked.

“I tried the app, but it’s not finding any of the stations,” Luther Cunningham said.

Normal service was restored by about 10:30 a.m.

MORE NEWS: As Jury Deliberates In R. Kelly Sex Trafficking Case, What Impact Will Verdict Have On His Future Trials In Chicago?

“Our updates have finished and we are up and running again. We apologize for any inconvenience due to the outage,” the company said in a Twitter post.