SAN FRANCISCO (CBS SF) – Starbucks is reportedly blaming a technology upgrade for a payment system outage at locations across the U.S. and Canada Tuesday morning.

Customers coast to coast took to social media to post pictures of locations that were closed, only accepting cash, or offering free coffee due to the outage.

READ MORE: Smash-And-Grab Thieves Hit San Jose Eastridge Mall Jewelry Store; 5 Sought

Company spokesperson Reggie Borges told Bloomberg that the technology update took place Tuesday morning. “When it was time to get them back up, some of them didn’t take,” he said.

READ MORE: Investigation Finds Vallejo Officer's Use of Deadly Force Not 'Reasonable'

Borges said a “limited number of locations” remained offline Tuesday morning, but did not give an exact number of stores that were impacted. There are about 14,000 Starbucks locations in the U.S. and Canada.

MORE NEWS: San Francisco Lights Up GG Park Christmas Tree After Darkest Year of Pandemic

A similar outage impacted point of sale terminals at thousands of Starbucks locations in the U.S. and Canada in 2015.