Popular workplace messaging service Slack suffered a massive outage late Tuesday evening, leaving users around the world unable to send or receive messages and files.
On Twitter, the company apologised for the disruption and said it was working to fix the issue.
At about 9:13 p.m. ET, the company said some users were able to successfully connect to the messaging app, but cautioned the issue is not yet fully fixed.
The company's status page still showed there were connectivity issues across all Slack services, including login, messaging and posts.
Slack has about 9 million weekly active users and is a popular mode of communication among many Silicon Valley firms, Fortune 100 companies and media organisations. On its website, Slack says it has more than 50,000 paying companies that use the service.
The messaging app raised $250 million in a funding round led by Japanese tech giant SoftBank in September. That put the company's overall valuation at $5.1 billion.
Users took to social media to complain about the service disruption. In true internet fashion, the memes and the jokes soon followed: