Apple customers were facing issues while upgrading to iOS 9, which was released on Wednesday, technology blog 9to5Mac has reported. The blog posted a screenshot showing an error message that appeared when users tried to install the latest version of the operating system for iPhone, iPad and the iPod touch.

Earlier Apple said it won’t release watchOS 2, an updated operating system for the Apple Watch, on Wednesday as planned after it discovered a bug in development.

Apple delayed the first major software update for its Watch because of a bug it discovered in the operating system that couldn’t be fixed before Wednesday’s planned release. The new watch software will be available soon, Apple spokeswoman Amy Bessette said, without providing a specific time frame. She declined to say what caused the problem, only that it’s “taking a bit longer to fix than we expected.”

Apple Watch is the company’s first new hardware product since the iPad’s 2010 debut and is a key part of chief executive officer Tim Cook’s strategy to find new areas of growth.

Reuters/Bloomberg