upgraded to 12000, 

While trying to edit the change workflow, if i open the workflow and click on save i get this error message,

without any modification or change. 

' Invalid/Inactive status Close - In Progress in statement Close."

what does it mean in English and how to fix it.

I went to this link https://help.servicedeskplus.com/configurations/problem_changemanagement/configuring_change_workflows.html$validate-workflow 

but page cannot be displayed