Check for error in Projeqto log file and in apache error log file.
Report any error here.

Thank you for your request for a supplement.

You will find in attachment the Apache error log.
Regarding, the log ProjeQto.log into the../files/logs/projeqtor_${date}.log, but the directory is empty.

==================================================================================================================================
Package Architecture Version Dépôt Taille
==================================================================================================================================
Installation :
php x86_64 5.4.16-42.el7 base 1.4 M
php-gd x86_64 5.4.16-42.el7 base 127 k
php-imap x86_64 5.4.16-7.el7 epel 38 k
php-mbstring x86_64 5.4.16-42.el7 base 505 k
php-pdo x86_64 5.4.16-42.el7 base 98 k
php-pgsql x86_64 5.4.16-42.el7 base 86 k
php-xml x86_64 5.4.16-42.el7 base 125 k
Installation pour dépendances :
libX11 x86_64 1.6.5-1.el7 base 606 k
libX11-common noarch 1.6.5-1.el7 base 164 k
libXau x86_64 1.0.8-2.1.el7 base 29 k
libXpm x86_64 3.5.12-1.el7 base 55 k
libc-client x86_64 2007f-16.el7 epel 562 k
libjpeg-turbo x86_64 1.2.90-5.el7 base 134 k
libpng x86_64 2:1.5.13-7.el7_2 base 213 k
libxcb x86_64 1.12-1.el7 base 211 k
libzip x86_64 0.10.1-8.el7 base 48 k
php-cli x86_64 5.4.16-42.el7 base 2.7 M
php-common x86_64 5.4.16-42.el7 base 564 k
postgresql-libs x86_64 9.2.23-1.el7_4 updates 233 k
t1lib x86_64 5.1.2-14.el7 base 166 k

Résumé de la transaction
==================================================================================================================================
Installation 7 Paquets (+13 Paquets en dépendance)

Your application is increbible/fanstatic !
Regards.

You post the apache access file.
We need the apache error log file.

And projeqtor log file should exist.
Otherwise it may be misconfiguration, source of your issues.

The directory is empty
[smatou@ProjeQtor logs]$ ls -altr
total 4
-rw-r--r--. 1 apache apache 1256 5 nov. 19:02 index.php
drwxr-xr-x. 10 apache apache 131 5 nov. 19:02 ..
drwxr-xr-x. 2 apache apache 23 5 nov. 19:02 .

We had no problem with Centos / Apache / MySQL / PHP !
If I uninstall PHP-XML the error message disappears, but I can not go to the next step

Hello,

I have just reinstalled my server from scratch.
Same issues.

Thank you for telling us quickly that ProjeQtor works well with this stack ?
Regards.

Log shows you are using SELinux.
This may lead to issues.
Try and disable SELinux for testing.
You can also try and look for SELinux in the forum. I remember other users had issues and posted solution.

Hello Babynus,

And thank you for helping us.
I disabled SELINUX in /etc/selinux/config (SELINUX = disabled)
And I restart the server.

sestatus
Selinux status: disabled.

getenforce
Disabled

I have the same problems:
- No log in the directory ../files/logs
- Now, I do not have the message directly: "A technical error probably occurred due to a bad network connection", but several seconds later.

I confess I do not understand where it can come from.

Please post apache error logs showing activity after disabling SELinux

error_log_2017-11-16.txt

access_log_2017-11-16.txt

audit.txt.log.

messages.txt

It seems you defined virtualhost www.projeqtor.fr pointing to /var/www/html
Rediect it to /var/www/html/projeqtor or access www.projeqtor.fr/projeqtor

I don't define vhost in httpd.conf

I don't know about your DNS configuration, but it may be the source of the issue.
You access to www.projeqtor.fr. As long as your local DNS resolve it as local IP, it can work, otherwise you'll be redirected to our servers (we own projeqtor.fr domain name)

To try and identify issue, open browser dev tool, on network tab.
When error occirs, select request on error and check response part.
We should have interesting information here.

Hello,

As requested :

text>ss='messageERROR'><i>SQLSTATE[08006] [7] could not connect to server: Connection refused
Is the server running on host "www.projeqtor.fr" (62.210.78.152) and accepting
TCP/IP connections on port 5432?<br/>dsn = pgsql:host=www.projeqtor.fr;port=5432</i></div><br/>

I try a new installation and change my DNS Name.
Regards.

Error is exactly what I previously guessed :
host=www.projeqtor.fr => "your" internal subdomain
host " www.projeqtor.fr " (62.210.78.152) : our IP. Our servers won't reply to your requests

So you have dns resolution errors.
Try and change your domain name to something that really belongs to you, something like projeqtor.yourdomain.com