I'm working through this media_entity upgrade as defined in FAQ - Transition from Media Entity to Media in core. The article 'strongly recommends' running the 'drush mecu' command.
I'm using Lando locally, so my command is 'lando drush mecu', however I'm getting the error:
Command "mecu" is not defined.
I'm running Drush version : 9.0.0-rc2
I had the same problem with Drush version : 9.0.0-rc1 too
I've tried running the command from both the server root folder and the web folder (ie composer version)