[Warn] namevirtualhost *: 80 has no virtualhosts appears after the Apache Virtual Host is configured in Ubuntu

After Multiple Apache Virtual Hosts are configured on Ubuntu, the following error message is displayed:

[Warn] namevirtualhost *: 80 has no virtualhosts

Cause: the syntax of namevirtualhost is incorrect. If the same host supports multiple virtual hosts, you only need to name namevirtualhost once. If namevirtualhost *: 80 is added to each virtual host configuration file, this warning is reported.

Originally, *: 80 virtualhost was defined in/etc/apache2/ports. conf. After finding this, everything goes smoothly. Delete the previously added namevirtualhost and change all vhost locations to *: 80. OK. Everything went very smoothly.