MENLO PARK (CBS SF / CNN) — Popular apps including Spotify, Pinterest and Tinder were crashing on iPhones on Friday in what appeared to be a widespread outage linked to a Facebook bug.

Reports of the crashes spiked on DownDetector, a service monitoring site, around 4:30 a.m. Pacific Time Friday, and users and developers vented their frustrations on social media.

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By 7:30 a.m., Facebook said on its developer forum that an error in its iOS software development kit was resolved, about eight hours after it started investigating the spike in crashes.

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Many app developers use this SDK to allow people to use their Facebook login information to sign into other apps — though users didn’t need to be using the Facebook login to be affected by the crashes.

It made for a frustrating Friday morning for developers and users of these apps, especially because a similar outage linked to the Facebook SDK occurred in May, according to the tech news site The Verge.

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