I got both the Apache and Nginx servers working fine until I ran:

sudo certbot --nginx -d myhost.com -d www.myhost.com

and restarted Nginx.

I got the error

nginx: [crit] pread() "/etc/nginx/sites-enabled/mod_rpaf-stable" failed (21: Is a directory)

Is it a permissions issue , or a problem with mod_rpaf-stable? I tried to find information online but I'm getting nowhere.


It sounds like you've erroneously placed mod_rpaf-stable to /etc/nginx/sites-enabled/. The latter expects NGINX configuration files with .conf extension, named after domain names of websites you intend to host on your server.

The mod_rpaf belongs to the Apache world, and it has nothing to do with NGINX. Remove it or move out outside NGINX configuration directory.

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