Micro-blogging platform Twitter apparently shut off its internal communication system of Slack and according to posts by employees on anonymous workplace chat app Blind, it is because they have stopped paying its Slack bills. 

The move left employees baffled and no one worked throughout the day on Friday as they were suddenly unable to communicate, reports Platformer.

Employees also lost access to Jira, a tracking software that allows engineers to ship code and monitor progress on new features.