Warning: ftp_nlist() expects parameter 1 to be resource, null given
This error message may appear on WordPress website when you do not have enough free disk space available on your hosting account.
To resolve the error either reduce the disk space usage of your account or consider upgrading to a higher hosting plan that offers more disk space. You can reduce the disk space usage of your account by deleting files that you don’t need from your websites from Site Tools -> Site -> File Manager. Make sure to create a backup of the website’s files first in case you unintentionally delete something required for the website’s proper operation.