My question not yet closed as dup, but I can't see That solve my problem button in the header:
Where is the button?
My question not yet closed as dup, but I can't see That solve my problem button in the header:
Where is the button?
It was removed because you edited the question. (Note, there is no "This did not solve my problem" button, only a link to edit the question.)
When you edit the question, it cause the buttons to disappear, and as explained here, they will be displayed again only if a new dupe flag will be cast after the edit, pointing to a different question.