Flutter开发HarmonyOS鸿蒙Next应用的时候提示File libflutter.so not found

Flutter开发HarmonyOS鸿蒙Next应用的时候提示File libflutter.so not found
【任务描述】 我使用flutter create --platforms ohos demo创建了一个flutter应用，然后cd到demo/ohos里进行编译构建，执行的命令为flutter build hap --target-platform ohos-arm64 --local-engine-src-path=E:\flutter_app\engine\ohos_release_arm64-1143-windows-AMD64\src --local-engine=ohos_release_arm64（我在每日构建中下载的引擎）,但是会出现如下错误，，于是我把鸿蒙的api版本降到了9，如下所示，此时会出现这样的报错File libflutter.so not found in [E:\flutter_app\engine\ohos_release_arm64-1143-windows-AMD64\src\out\ohos_release_arm64\libflutter.so, E:\flutter_app\demo\ohos\har\har_product\libflutter.so.release.9, E:\flutter_app\flutter_flutter\packages/flutter_tools/templates/app_shared/ohos.tmpl/har/har_product.tmpl\libflutter.so.release.9] 我看issue区里好像没人遇到过。