Unformmatted citation and unable to switch to formatted one


I am using EndNote X9. My citations are always unformatted and cannot be switched to formatted ones, despite of whatever I do. I turned off Instant formatting, but the citation stayed unformatted, but without hyper link to EndNote library. I updated citations and bibliography but it did not help. I recovered the library, and inserted all citations using the newly recovered one, but the problem has not been solved. 

Can you please tell me what happen?

Thank you.

duplicate post:  https://community.endnote.com/t5/EndNote-General/Unformmatted-citation-and-unable-to-switch-to-formatted-one/m-p/157885