Not compatible with latest version of serverless (1.60.5)

[oolooroo]

What did you do?
sls env -a abc -v abc

What happened?
Serverless Error ---------------------------------------

"abc" is not a valid sub command. Run "serverless env" to see a more helpful error message for this command.
What should've happened?
An environment.yml file should have been generated with a variable 'abc' of value 'abc'.

What's the content of your serverless.yml file?

service: test

provider:
name: aws
runtime: nodejs12.x

functions:
hello:
handler: handler.hello
What's the output you get when you use the SLS_DEBUG=* environment variable (e.g. SLS_DEBUG=* serverless deploy)