500 error page returnes from: demo.joomla.org/demo15 on email verification

[ahclancy]

I was sent this url to verify registration for the "demo15" site:
http://demo.joomla.org/demo15//index.ph ... 9802cff223

The page returned has the following error message:
------------------------------------------------------------
An error has occurred while processing your request.
Please try one of the following pages:
    * Home Page
If difficulties persist, please contact the system administrator of this site.
Layout "register_message" not found
------------------------------------------------------------

This is the second day for this message.  I can not get access as a result.
Demo10 does work.  usr/pwd from it does not work in Demo15, an intended feature?

[RobInk]

Moderator note; moving from General >> S&I Forum

[ahclancy]

RESOLVED
After days of attempts.  Error page still displays.
I got a new email account and used that.  Error page, but I could now login using same usr/pwd.
Thanks to the 165 of you who at least looked.

I was sent this url to verify registration for the "demo15" site:
http://demo.joomla.org/demo15//index.ph ... 9802cff223

The page returned has the following error message:
------------------------------------------------------------
An error has occurred while processing your request.
Please try one of the following pages:
    * Home Page
If difficulties persist, please contact the system administrator of this site.
Layout "register_message" not found
------------------------------------------------------------

This is the second day for this message.  I can not get access as a result.
Demo10 does work.  usr/pwd from it does not work in Demo15, an intended feature?