invalid citation

how to solve a problem of invalid citation ? how to run " recover library" ?

Please see the following Knowledge Base Articles

EndNote CWYW: (!!! Invalid CItation !!!) in document

https://support.clarivate.com/Endnote/s/article/EndNote-CWYW-Invalid-CItation-in-document?language=en_US

The proper process for recovering library files

https://support.clarivate.com/Endnote/s/article/EndNote-The-proper-process-for-recovering-library-files?language=en_US