Hello,
I am trying to use a template to initiate a new project.
After clicking on the copy button, an error message is appearing "responsible field is mandatory".
I was doing the same method several months ago and it was working.
I am on version 10.1.2
I have tried to do the same on an activity (which has several sub-actvities) of this template, buy copying an activity and I have the same error message.
I have a added a responsible in the first activity but the result is the same.
Regards,
Possibly you set reponsible as required after creation of the template.
Try and save activities of the template, maybe you'll get same error message.