Password protection doesn't work

While trying to protect directory, I get the following message:

An error occured while attempting to protect the directory

Details

Unable to read the protected directories list file

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I SSHed into account and took a look at the directory. .htaccess files looks like

AuthGroupFile /dev/null
AuthName "admin"
AuthType Basic
AuthUserFile /home/admin/domains/mydomain.com/.htpasswd/public_html/.htpasswd

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and there is no /home/admin/domains/mydomain.com/.htpasswd directory.

Hello,

Make sure you check the checkbox at the top left corner of the password protected screen.

John

Thank you.