EndNote error

I have word contain my citation, when trying to add another one it give me citation in {author, year #number} formate when trying to solve it by Turn instant formatting on then update citation it doesnot work, and after trials it give me message contain (attemped to access an unnamed file past its end)

I use windows10, word2019 and office2019

Please try the steps at

https://support.clarivate.com/Endnote/s/article/EndNote-Windows-An-attempt-was-made-to-access-an-unnamed-file-past-its-end?language=en_US

If the above does not resolve the issue then please contact Technical Support directly

1-800-336-4474 option 4 then 1

or

https://endnote.com/contact/

The linke you mention told me to update my endnote version, when trying to do that i see this message (on attachment)
Screenshot_2.jpg

Please contact Technical Support directly

1-800-336-4474 option 4 then 1

or

https://endnote.com/contact/

We would need to troubleshoot all the issues you are having directly.

On my word document (endnote tab- instant formattion is on), when trying to add another citation instant formatting becomes of and citation become in (author, year #number) formt.

What is wrong with this, and how can i solve this problem?