Can not upgrade wordpress manually by filezilla and file manager of Cpanel

I have website made by wordpress, today I try upgrade it to 6.3.1 from 6.2.2, from upgrade menu. so I try upgrade it manually, So I download zip file of wordpress and extract it and delete wp-content folder and make new zip file and move it to public \_html folder, and extract it there, so I go to folder extracted from zip file and select all folders and files and try move it to public\_html folder, but I see this error after some seconds ,

FileOps Failure on:/home/xyz/public_html/wordpress/wp-admin: Not a directory

and can not copy or move two wp-admin and wp-includes to public html ,

So I try do this with filezilla and filezilla can not copy above two directories and upgrade failed and filezilla show me error about

Error: Critical file transfer error

and can not upgrade.


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