I have a question. The point is that I can not do any test case and it does not show me any activity of my operations. I don't know what is going on.
We'll need more information to look into this with you. I have created a support case for you and the support team will contact you via that case.
You may also file a support case yourself by clicking the 'Support' link at the bottom of any Agile Central page when you are logged into Agile Central. More information about that is available here, Product Announcement: Easy access to CA Support from Agile Central!
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