Error "A property without annotation isn't considered during up-to-date checking." with Gradle 7 and App Distribution Gradle Plugin

[REQUIRED] Step 2: Describe your environment

• Android Studio version: Artic Fox Canary 14
• Firebase Component: App Distribution Gradle Plugin
• Component version: 2.1.0

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

I am using Android Gradle Plugin version 7.0.0-alpha14 and Gradle version 7.0 and when I try to upload the app to app distribution through the Gradle plugin version 2.1.0 it fails on a task app:appDistributionUploadDebug with an error

> Task :app:appDistributionUploadDebug FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Some problems were found with the configuration of task ':app:appDistributionUploadDebug' (type 'UploadDistributionTask').
  - Type 'UploadDistributionTask' property 'COMMAND_LINE_PREFIX' is missing an input or output annotation.
    
    Reason: A property without annotation isn't considered during up-to-date checking.
    
    Possible solutions:
      1. Add an input or output annotation.
      2. Mark it as @Internal.
    
    Please refer to https://docs.gradle.org/7.0/userguide/validation_problems.html#missing_annotation for more details about this problem.
  - Type 'UploadDistributionTask' property 'appDistributionProperties' is missing an input or output annotation.
    
    Reason: A property without annotation isn't considered during up-to-date checking.
    
    Possible solutions:
      1. Add an input or output annotation.
      2. Mark it as @Internal.
    
    Please refer to https://docs.gradle.org/7.0/userguide/validation_problems.html#missing_annotation for more details about this problem.
    ```

[leinardi]

Can confirm: we are getting this error with AGP 4.1.3 and Gradle 7.0:

FAILURE: Build failed with an exception.
 
* What went wrong:
A problem was found with the configuration of task ':apps:dsa:appDistributionUploadAustriaRelease' (type 'UploadDistributionTask').
  - Type 'UploadDistributionTask' property 'appDistributionProperties' is missing an input or output annotation.
 
    Reason: A property without annotation isn't considered during up-to-date checking.
 
    Possible solutions:
      1. Add an input or output annotation.
      2. Mark it as @Internal.
 
    Please refer to https://docs.gradle.org/7.0/userguide/validation_problems.html#missing_annotation for more details about this problem.
 
* 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.

[CristianGM]

2.1.1 fixed the issue for me