Cloudflare, the prominent U.S. internet infrastructure firm, announced on Friday that it had resolved a problem affecting its dashboard and associated applications.

The company’s stock experienced a decline of up to 4.5% in premarket trading after numerous international websites experienced outages, prompting Cloudflare to initiate an investigation into the issue.

Cloudflare quickly released a statement confirming that a solution had been “implemented” and that the situation was being monitored for effectiveness. Following this update, the company’s shares recovered slightly, showing a 2% decrease.

Affected websites included major platforms such as LinkedIn, the cryptocurrency exchange Coinbase, and the online publishing site Substack.

Outage monitoring site Downdetector, which itself appeared to be briefly impacted, said users reported a sharp uptick in problems on sites, including e-commerce platform Shopify, HSBC and food delivery group Deliveroo, among others, at around 9:16 a.m. London time.

These reports fell as Cloudflare implemented its fix shortly thereafter.

The outage comes less than three weeks after a similar Cloudflare crash caused error messages across the internet, an issue that the company said was “unacceptable” at the time, given the importance of its services.

Cloudflare’s software is used by many businesses worldwide, helping to manage and secure traffic for about 20% of the web. Among the services it provides are that it guards against distributed denial of service attacks, which are when malicious actors attempt to overload a website’s system with so many traffic requests that it can’t function.

— CNBC’s Annie Palmer contributed to this report.