Installation Error

Hi @bures1
I think there is a kind of server permission, the issue did not come from your WordPress installation folder but it related to server temproary directory, the solution for it is installing the plugin via FTP or better, contact your hoster and let them resolve the issue.
Also, there is a topic have exactly issue like you:
https://wordpress.org/support/topic/update-failed-the-package-could-not-be-installed-pclzip_err_missing_file-4/

@bures1

since we haven’t heard back from you, I’m going to mark it as resolved.
If you’re still having problems, feel free to let us know ;),

Btw, If you find BackWPUp is useful for you, we would really appreciate if you leave a positive review and rating.
This would encourage us to develop new free features and provide free support 😀
https://wordpress.org/support/plugin/backwpup/reviews/