This is a compatibility issue between the email and public profile versions. In the 2.2 release (current release in the app store) the mentioned microflow is called send emailmessage. In an older version the microflow is called sendemail (v1.1). The other errors are also probably due to the version used in the public profile app and the email app version. What you could try is to use the older version of the email app in combination with the public profile app. And maybe submit a request to update the public profile app to the new version of the email app.
Great thanks, I thought it may be but wasn't sure