could not resolve all files for configuration ':launcher:debugruntimeclasspath'.

[JungSeowo0]

[READ] For Firebase Unity SDK issues, please report to Firebase Unity open-source

Once you've read this section and determined that your issue is appropriate for this repository, please delete this section.

[REQUIRED] Please fill in the following fields:

• Unity editor version: 6000.0.37f1
• Firebase Unity SDK version: 12.6.0
• Source you installed the SDK: .unitypackage (.unitypackage or Unity Package Manager)
• Problematic Firebase Component: Auth, AppCheck, Messaging,Analytics (Auth, Database, etc.)
• Other Firebase Components in use: Auth, AppCheck, Messaging,Analytics (Auth, Database, etc.)
• Additional SDKs you are using: Uniwebview, AppsFlyer, GoogleSignIn, Adjust (Facebook, AdMob, etc.)
• Platform you are using the Unity editor on: Windows (Mac, Windows, or Linux)
• Platform you are targeting: Android (iOS, Android, and/or desktop)
• Scripting Runtime: IL2CPP (Mono, and/or IL2CPP)

[REQUIRED] Please describe the issue here:

Android Build in Unity 6
Occured Build Error Unity Window "Could not resolve all files for configuration ':app:debugRuntimeClasspath'

Other Error Log are
Could not find com.google.firebase:firebase-appcheck-unity:12.6.0.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/firebase/firebase-appcheck-unity/12.6.0/firebase-appcheck-unity-12.6.0.pom
- https://repo.maven.apache.org/maven2/com/google/firebase/firebase-appcheck-unity/12.6.0/firebase-appcheck-unity-12.6.0.pom
- https://jcenter.bintray.com/com/google/firebase/firebase-appcheck-unity/12.6.0/firebase-appcheck-unity-12.6.0.pom
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-appcheck-unity-12.6.0.jar
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-appcheck-unity.jar
Required by:
project :launcher > project :unityLibrary

Could not find com.google.firebase:firebase-app-unity:12.6.0.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/firebase/firebase-app-unity/12.6.0/firebase-app-unity-12.6.0.pom
- https://repo.maven.apache.org/maven2/com/google/firebase/firebase-app-unity/12.6.0/firebase-app-unity-12.6.0.pom
- https://jcenter.bintray.com/com/google/firebase/firebase-app-unity/12.6.0/firebase-app-unity-12.6.0.pom
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-app-unity-12.6.0.jar
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-app-unity.jar
Required by:
project :launcher > project :unityLibrary
Could not find com.google.firebase:firebase-messaging-unity:12.6.0.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/firebase/firebase-messaging-unity/12.6.0/firebase-messaging-unity-12.6.0.pom
- https://repo.maven.apache.org/maven2/com/google/firebase/firebase-messaging-unity/12.6.0/firebase-messaging-unity-12.6.0.pom
- https://jcenter.bintray.com/com/google/firebase/firebase-messaging-unity/12.6.0/firebase-messaging-unity-12.6.0.pom
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-messaging-unity-12.6.0.jar
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-messaging-unity.jar
Required by:
project :launcher > project :unityLibrary
Could not find com.google.firebase:firebase-auth-unity:12.6.0.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/firebase/firebase-auth-unity/12.6.0/firebase-auth-unity-12.6.0.pom
- https://repo.maven.apache.org/maven2/com/google/firebase/firebase-auth-unity/12.6.0/firebase-auth-unity-12.6.0.pom
- https://jcenter.bintray.com/com/google/firebase/firebase-auth-unity/12.6.0/firebase-auth-unity-12.6.0.pom
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-auth-unity-12.6.0.jar
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/firebase-auth-unity.jar
Required by:
project :launcher > project :unityLibrary

Other things besides FireBase

Could not find com.google.signin:google-signin-support:1.0.4.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/google/signin/google-signin-support/1.0.4/google-signin-support-1.0.4.pom
- https://repo.maven.apache.org/maven2/com/google/signin/google-signin-support/1.0.4/google-signin-support-1.0.4.pom
- https://jcenter.bintray.com/com/google/signin/google-signin-support/1.0.4/google-signin-support-1.0.4.pom
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/google-signin-support-1.0.4.jar
- file:/C:/F4Um_6/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/libs/google-signin-support.jar
Required by:
project :launcher > project :unityLibrary

I am getting errors saying that dependencies cannot be found.

(Please list the full steps to reproduce the issue. Include device logs, Unity logs, and stack traces if available.)

Steps to reproduce:

Have you been able to reproduce this issue with just the Firebase Unity quickstarts (this GitHub project)?
What's the issue repro rate? (eg 100%, 1/5 etc)

What happened? How can we make the problem occur?
This could be a description, log/console output, etc.

If you have a downloadable sample project that reproduces the bug you're reporting, you will
likely receive a faster response on your issue.

Relevant Code:

// TODO(you): code here to reproduce the problem

[JungSeowo0]

Build was successful.

The solution was to delete all packages SDK, Gradle files, AndroidManiFest files, etc. that were currently applied to the project,

and install the latest version of Firebase Unity SDK 12.6.0, and the build was successful.

@argzdev But I wonder if you have any advice for me?
If not, I'll close the issue.