# Fatal Exception in Release versions of iOS/Android App

**URL:** <https://community.sendbird.com/t/fatal-exception-in-release-versions-of-ios-android-app/5161>\
**Category:** JavaScript\
**Tags:** chatsdk, react-native\
**Created:** [July 25, 2022, 3:58pm UTC](https://community.sendbird.com/t/fatal-exception-in-release-versions-of-ios-android-app/5161 "2022-07-25T15:58:25Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![Tyler](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/tyler/32/810_2.png) [@Tyler](https://community.sendbird.com/u/Tyler)\
**Post date:** [September 8, 2022, 2:25am UTC](https://community.sendbird.com/t/fatal-exception-in-release-versions-of-ios-android-app/5161/12 "2022-09-08T02:25:09Z")

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Hi all,

I believe we’ve answered this via a support case but I’ll also post it here. Our Engineering team did a deep dive on the topic and determined that this is no longer an issue when using React-Native v.065 or higher. This is a error within Metro Bundler ([reference](https://github.com/facebook/metro/commit/150d13eb9abdad45606a3ada0613947e751d9542))

The Engineering team has created a sample project on how to patch this which you can find here: [GitHub - bang9/v4-rn-patch: metro bundler patch](https://github.com/bang9/v4-rn-patch/tree/main)

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