: A prefix used in C++ name mangling to indicate a namespace. "facebook3jsi7JSErrorE" : Decodes to facebook::jsi::JSError . Common Causes

Ensure that all libraries using JSI (like react-native-gesture-handler or bottom-sheet ) are compatible with your current version of reanimated . 3. Debugging Production Crashes

: Double-check your babel.config.js to ensure the Reanimated plugin is listed last in the plugins array, as required by the official documentation. Clean and Rebuild :

JSI is a lightweight, general-purpose API for JavaScript engines. In React Native, JSI enables direct function calls between the JavaScript engine and the native runtime environment, bypassing the older, slower "Bridge" mechanism that used to serialize everything into JSON. This direct communication is what makes modern React Native apps fast.

: Version mismatches or layout animation bugs within react-native-reanimated frequently cause thread collisions over the JSI.

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