my develop environment：
Flutter 3.41.7
Tools • Dart 3.11.5 • DevTools 2.54.2
andriod studio 2026.3.3
andriod sdk36.1
I run 【flutter doctor】command ，no error message
show picture1
when run 【flutter build apk --release】 command ，show error message
show picture2
I am in China network environment，so I change the maven source，I add many maven source links
like this：
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maven { url=uri (“https://jitpack.io”) }
maven { url=uri (“https://maven.aliyun.com/repository/releases”) }
maven { url=uri(“https://maven.aliyun.com/repository/jcenter”) }
maven { url=uri (“https://maven.aliyun.com/repository/google”) }
maven { url=uri (“https://maven.aliyun.com/repository/central”) }
maven { url=uri (“https://maven.aliyun.com/repository/gradle-plugin”) }
maven { url=uri (“https://maven.aliyun.com/repository/public”) }
maven { url=uri (“https://repo.huaweicloud.com/repository/maven/”) }
maven { url=uri (“https://maven.aliyun.com/nexus/content/groups/public”) }
maven { url=uri (“https://download.flutter.io”) }
maven { url=uri (“https://oss.sonatype.org/content/repositories/”) }
But still show error message!show picture2
annotation：I run 【keytool -genkey -v -keystore laoliudemo3.jks -keyalg RSA -keysize 2048 -validity 10000 -alias laoliudemo3】
I change the file 【myapp\android\key.properties】 absolute path，you can change it。
But,when i run command【flutter build apk --release】 still show error message！
source code link：
How to solove？thank you