"Invalid feature flag configuration" error message when running the amplify CLI

[manu2504]

Describe the bug
Whatever option I'm providing to the amplify CLI when I run it, it exits with the following error message:

$ amplify -v
Invalid feature flag configuration

These feature flags are defined in the "amplify/cli.json" configuration file and are unknown to the currently running Amplify CLI:
  - latestregionsupport
  - project
  - graphqltransformer.improvepluralization
  - graphqltransformer.transformerversion
  - graphqltransformer.suppressschemamigrationprompt
  - graphqltransformer.securityenhancementnotification
  - graphqltransformer.showfieldauthnotification
  - auth.forcealiasattributes
  - auth.useenabledmfas
  - codegen.enabledartnullsafety

This issue likely happens when the project has been pushed with a newer version of Amplify CLI, try updating to a newer version.

Learn more about feature flags: https://docs.amplify.aws/cli/reference/feature-flags

(Same error when running amplify (without option), amplify pull --appId xxxx --envName yyyy).

To Reproduce
No clue...

Expected behavior
Amplify CLI should return the current amplify version when I run amplify -v. Potentially with additional warning if necessary.

Desktop (please complete the following information):

• OS: macOS

Additional context
Using:

• node v12 and npm v6
• @aws-amplify/cli@9.2.1

(Same issue with node v14 and npm v6.)

[manu2504]

Closing as duplicate of aws-amplify/amplify-cli#10514