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Futter3.0 WidgetsBinding.instance? 问题

2

## Steps to Reproduce **A small application to reproduce the bug(最小化可复现的demo)** 1. ... 2. ... 3. ... **Flutter Boost Version** **Target Platform:** **Target OS version/browser:** **Devices:** ## Logs add your...

An empty identity is not valid when signing a binary for the product type 'Application'.