Apple is now rolling out its newest beta version of iOS 10 for developers and beta testers to test out the features of the upcoming mobile OS that was announced at the 2016 Worldwide Developers Conference in June. Unfortunately, some users are complaining about an error that would not allow them to access the new beta software.

On Friday,  the Cupertino giant released the eighth beta of iOS 10 to developers and the seventh beta of the new mobile OS to public beta testers. The new build for developers is identified as 14A5346a, while the build for public testers is named 14T5329a.

Unlike the previous beta releases, however, the newest iOS 10 beta seems to have a shaky rollout, with Apple Insider reporting that the update was met with complaints from users — possibly both developers and public beta testers — claiming that the software could not be found and that their devices alerted them that they were “Unable to Check for Update.”

It isn’t clear if the issue has already been addressed as of writing. Nonetheless, Friday’s release is expected to fix certain bugs and issues found in the previous beta versions released by Apple — the same thing that the seventh developer beta came with.

The release of the new iOS 10 beta actually hints at the imminent release of the official mobile OS this fall. Per MacRumors, the iOS 10 is a major OS update that should come with new features, like 3D Touch-enabled notifications, a new widgets screen, an overhauled Messages app, an enhanced Photos app and a redesigned Control Center, among many others.

MacRumors also stated that the eighth beta of iOS 10 could be the final beta version prior the planned announcement of the iOS 10 this fall. The golden master of iOS 10 is expected to be launched the same day as the public unveiling of Apple’s new iPhone 7 and iPhone 7 Plus.

Apple is also scheduled to launch and release the watchOS 3, macOS Sierra and tvOS 10 sometime this fall.