Error Page different from what it is supposed to be
Solution. Go to
Guided Procedure -> Design Time.
Click on the "Callable Object"
"Object Defination" Tab
and choose the correct HTML.

Below the error that might be found
Error found.  This object is being locked by XXXuser.
Solution. Go to
Guided Procedure -> Administrator.
Unlock Object. Try to find the Object development to unlock

*choosing the correct html

Go to portal Content
-> Content Provided by SAP\End User
Content\Employee Self-Service\Custom Content\Life and Work Events
Open
the "Iview" (Marriage)
Find the field "Application Parameters"
And
change the process.template.id; eg.
(process.template.id=88394210FCBB11DCC1F000145EC7373A&process.autostart=true)