I am trying to install the custom domain plugin but keep receiving the error:
Serverless › The action "plugin" is not supported by this component.
Even the plugin commands from docs are not working. Example: https://www.serverless.com/framework/docs/providers/aws/cli-reference/plugin-list/
serverless plugin list
Sls cli version: 3.7.1
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS