Remote Database connection

We have an assignment from school. Make 2 ubuntu servers, 1 with wordpress and 1 with a database server. Then setup WordPress and use the remote database server.

I have made this setup locally in virtual box.
Ip: My desktop 10.0.1.1, ubuntuserver1(wordpress) 10.0.1.2, ubuntuserver2(database) 10.0.1.3

I have everything installed and database has been created. Then when I go to http://10.0.1.2/wp-admin/setup-config.php?step=1, and try to configure the database it isn’t working.

I tried to check if the database is available from 10.0.1.2 to 10.0.1.3 with the user I have made for the database, and I’m able to connect and see the database.

--------------
mysql  Ver 15.1 Distrib 10.1.43-MariaDB, for debian-linux-gnu (x86_64) using rea

Connection id:          3
Current database:
Current user:           [email protected]
SSL:                    Not in use
Current pager:          stdout
Using outfile:          ''
Using delimiter:        ;
Server:                 MySQL
Server version:         5.7.28-0ubuntu0.18.04.4 (Ubuntu)
Protocol version:       10
Connection:             10.0.1.3 via TCP/IP
Server characterset:    latin1
Db     characterset:    latin1
Client characterset:    utf8mb4
Conn.  characterset:    utf8mb4
TCP port:               3306
Uptime:                 50 sec

Threads: 1  Questions: 5  Slow queries: 0  Opens: 105  Flush tables: 1  Open tab
--------------

MySQL [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| wordpress          |
+--------------------+
2 rows in set (0.00 sec)

I have tried many things however, at this moment I’m clueless what to try.
I can start and run the installation, however when I press the button, it stops and:

This page isn’t working 10.0.1.2 is currently unable to handle this request.
HTTP ERROR 500

shows up.

All things can help 😀 !, please if something comes to your mind tell me.

– Tom
The links I have used:

Main
https://www.tecmint.com/install-wordpress-on-ubuntu-16-04-with-lamp/
Ports
https://www.cyberciti.biz/faq/linux-apache2-change-default-port-ipbinding/
Mysql
https://help.ubuntu.com/lts/serverguide/mysql.html
PHP
https://askubuntu.com/questions/873768/how-do-i-install-php7-on-ubuntu-14-04
Remote
https://www.linode.com/docs/databases/mariadb/configure-wordpress-remote-database/