Problem with XAMPP after installation
Your answer is found here:
https://serverfault.com/questions/617591/proftpd-unable-to-determine-ip-address/617593#617593

you will need to do an ifconfig at the command line and post it. We will also need you to provide your hostname by posting the output of cat /etc/hosts.

Then you will change /etc/hosts to

x.x.x.x  MacBook-Pro-de-Gloria.local
xxxx:xxxx:xxx:xx::x MacBook-Pro-de-Gloria.local


The IP addresses above will be provided by ifconfig (assuming this server is on your own system). It is likely that the IP address will be 127.0.0.1, and the IPv6 address will start with fe80:

or (better) fix the setup to have a proper FQDN and naming scheme.