Internal Server Error after installation

I’ve some issues with a test installation of Indico. I installed it following the so-called “production installation instructions” with Apache.
By the way, the following command doesn’t work anymore (error 404):
yum install -y
I’ve used this one:
yum install

I’ve created a VM with Centos7 (minimal install) and at the end of the installation of Indico I obtain an Internal Server Error 500 when I point the browser to https://IP_ADDRESS.
I also noticed that uwsgi causes peaks of 100% of cpu load.

Here below is the output of /var/log/httpd/error_log:

AH00112: Warning: DocumentRoot [/var/empty/apache] does not exist
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 
fe80::a00:27ff:fe15:a393. Set the 'ServerName' directive globally to suppress this message
[Tue May 19 20:10:45.275784 2020] [lbmethod_heartbeat:notice] [pid 5662] AH02282: No slotmem 
from mod_heartmonitor
[Tue May 19 20:10:45.276906 2020] [ssl:warn] [pid 5662] AH02292: Init: Name-based SSL virtual 
hosts only work for clients with TLS server name indication support (RFC 4366)
[Tue May 19 20:10:45.279407 2020] [mpm_prefork:notice] [pid 5662] AH00163: Apache/2.4.6 
(CentOS) OpenSSL/1.0.2k-fips configured -- resuming normal operations
[Tue May 19 20:10:45.279439 2020] [core:notice] [pid 5662] AH00094: Command line: 
'/usr/sbin/httpd -D FOREGROUND'

Here below the output of /var/log/httpd/ssl_error_log

[Tue May 19 20:10:45.137067 2020] [ssl:warn] [pid 5662] AH01909: RSA certificate configured for 
fe80::a00:27ff:fe15:a393:443 does NOT include an ID which matches the server name

Please, could you give me some hints?
Thank you in advance.

This should fix the problem.

Also, thanks for reporting the postgres install error. I’ll update our docs tomorrow.

I confirm that the fix seems to work fine. Now I can see the bootstrap phase of Indico on my browser.
Thank you very much for the help!

Docs are updated now.