ProcessException: Process exited abnormally:
fatal: unable to access 'https://github.com/flutter/flutter.git/': OpenSSL SSL_read: Connection was reset, errno 10054
Command: git fetch --tags
The reason is that the computer network speed is not good, and github cannot be updated. The solution is to replace the flutter remote address with code cloud
According to this idea, in the future, when we encounter something on github that cannot be solved, we will go to Code Cloud to find it. Generally, the star project Code Cloud officially provides synchronization, and small projects can create a new warehouse in Code Cloud and synchronize from github.
Configure system environment variables
FLUTTER_GIT_URL=https://gitee.com/mirrors/Flutter.git
Re-update (if the permissions are not enough, replace it with an administrator terminal)
flutter upgrade --force