Internet infrastructure company Cloudflare on Friday said it was investigating an outage that took place in the morning that brought down several global websites, including LinkedIn and Zoom, the second such crash to affect the company in less than three weeks.

Cloudflare said the issue had been resolved, and that it was “investigating issues with Cloudflare Dashboard and related APIs,” or application programming interfaces, that allow software systems to communicate with each other.

The company, which is a content delivery network, said the outage was not due to an attack. A change to how its firewall handles requests “caused Cloudflare’s network to be unavailable for several minutes this morning,” the company said.

Users on X also reported problems accessing the website.

In November, a Cloudflare outage affected users of everything from ChatGPT and the online game League of Legends to the New Jersey Transit system.

Last month, Microsoft had to deploy a fix to address an outage of their Azure cloud portal that left users unable to access Office 365, Minecraft and other services. The tech company wrote on its Azure status page that a configuration change to its Azure infrastructure caused the outage.

Amazon also experienced a massive outage of its cloud computing service in October.