i can't run mobile app successfully so i try to run command ./gradlew clean on android folder and got this
* What went wrong:
A problem occurred configuring project ':app'.
> Could not determine the dependencies of null.
> Could not resolve all task dependencies for configuration ':app:classpath'.
> Could not find com.google.code.gson:gson:2.8.5.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/code/gson/gson/2.8.5/gson-2.8.5.pom
If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
Required by:
project :app > com.google.gms:google-services:4.3.12
> Could not find com.google.guava:guava:27.0.1-jre.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/guava/guava/27.0.1-jre/guava-27.0.1-jre.pom
If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
Required by:
project :app > com.google.gms:google-services:4.3.12
project :app > com.google.gms:google-services:4.3.12 > com.google.android.gms:strict-version-matcher-plugin:1.2.4
> Could not find com.google.code.findbugs:jsr305:3.0.2.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.pom
If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
Required by:
project :app > com.google.gms:google-services:4.3.12 > com.google.android.gms:strict-version-matcher-plugin:1.2.4
> Could not find org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.4.10.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.4.10/kotlin-stdlib-jdk8-1.4.10.pom
If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
Required by:
project :app > com.google.gms:google-services:4.3.12 > com.google.android.gms:strict-version-matcher-plugin:1.2.4
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 1m 25s
6 actionable tasks: 6 executed