Nintendo recently entered the mobile market for the first time with Miitomo, a free-to-play social app. Nintendo released a new update for Miitomo yesterday that gives players more options for adding friends, including the ability to add friends via email. Unfortunately, this new feature isn’t working properly for all phones. Specifically, people using iOS 9.3 / 9.3.1 phones are finding that adding friends via invitation causes the game to crash. Thankfully, Nintendo is already aware of the problem, and they’ve issued a notice stating that they’re working on a solution. Hopefully it will be resolved quickly.
Source: Nintendo Everything