No warning Message during registration in EasySocial

In Joomla Payplan registration when a new user account is configured to be approved by Joomla administrator, in final step registration a user will receive a message:
"Your account has been created. Note that your account will be active on subscription's activation. For now, you can continue"

In my case I am using ES registration with Payplan and a new user must also be approved by a site administrator. This time however this warning message does not appear in a final pre-payment stage. How can I get this useful warning message to show in ES registration too?

I contacted Payplan but according to them it is up to you to display this warning message.