Serverless Framework V3 with serverless-dotenv-plugin

[vijayporterdev]

I'm in the process of migrating the serverless v2.40 to v3.21.0 and facing the errors like this
`Error:
Cannot resolve serverless.yml: Variables resolution errored with:

• Cannot resolve variable at "provider.region": Value not found at "env" source,
• Cannot resolve variable at "provider.apiGateway.apiKeys.0": Value not found at "env" source,
• Cannot resolve variable at "provider.apiGateway.apiKeys.1": Value not found at "env" source,
• Cannot resolve variable at "custom.sentry.dsn": Value not found at "env" source,`

And we're using separate dot env for each stage (i.e .env.development,.env.staging,.env.production). So, if anyone knows the way of doing it please share.