TOPIC: Mailing to registered does not work anymore

I upgaded to DTRegister 3.1.5c
And moved from Joomla 3.4.7 that broke registraton to 3.4.4

Most seem to work now but I am not able to email to selected registered users anymore. I get this eror:

email to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to groupemail to group

Are any of you having this same problem?

My EMAIL REGISTRANTS is also broken. I'm using all of the latest Joomla and DT Register Versions. When I submit my email from this screen, I'm just taken to a blank screen. There is no error message displayed at all.