Cloudflare is down, affecting millions of people.

Among the major names reportedly affected were VPN provider NordVPN and takeaway delivery service Just Eat.

Fitbit, Peleton, and Bet365 were also reportedly targeted, leaving many users with a mysterious “500 Internal Server error.”

Cloudflare, the backbone of many websites, admitted it was the source of the problem after experiencing a “critical” incident.

After the alarm was raised at around 8 a.m. UK time, it took about an hour for techies to implement a fix.

Cloudflare announced that the incident had been resolved shortly after 9 a.m.

Users flocked to Twitter to find out what’s happening.

“Seems that there are issues with Cloudflare services that affect a wide range of services, including ours,” NordVPN, which has millions of customers, responded. The team, on the other hand, is already investigating and working to resolve the issue.

“We apologise for any inconvenience this has caused.”

However, NordVPN was not alone; Cloudflare is used by many websites.

Discord, Omegle, DoorDash, Crunchyroll, Feedly, Zerodha, Medium.com, news outlet Register, Groww, Buffer, iSpirt, Upstox, and Social Blade were also affected, according to TechCrunch.

According to The Verge, Shopify, Grindr, Fitbit, Peleton, Just Eat, and Bet365 all had issues.

What caused the outage at Cloudflare?

According to Cloudfare’s status page, the problem was classified as a “critical P0 incident.”

“Connectivity in Cloudflare’s network has been disrupted in large areas,” the company said at the time.