Situation
I changed /etc/httpd/conf/httpd.conf
as recommend in this thread.
Modules mentioned in that thread are loaded.
[jbusch@openemr ~]$ sudo httpd -M | grep "headers\|rewrite"
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using fe80::5400:3ff:fe66:a528. Set the 'ServerName' directive globally to suppress this message
headers_module (shared)
rewrite_module (shared)
OpenEMR Version
OpenEMR 6.0.0
[jbusch@openemr ~]$ cat /etc/oracle-release
Oracle Linux Server release 8.4
[jbusch@openemr ~]$ php -v
PHP 7.4.6 (cli) (built: May 12 2020 08:09:15) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
Browser:
Firefox (on Fedora Linux)
Logs
[jbusch@openemr ~]$ sudo tail -f /var/log/httpd/ssl_access_log
172.70.126.28 - - [17/Jul/2021:21:03:49 -0500] "POST /openemr/interface/main/dated_reminders/dated_reminders.php HTTP/1.1" 200 91
172.70.126.28 - - [17/Jul/2021:21:03:49 -0500] "GET /openemr/Documentation/help_files/message_center_help.php HTTP/1.1" 200 21739
172.70.126.28 - - [17/Jul/2021:21:03:51 -0500] "GET /openemr/interface/modules/zend_modules/public/Installer HTTP/1.1" 404 196
172.70.126.28 - - [17/Jul/2021:21:03:59 -0500] "GET /openemr/portal/patient/provider HTTP/1.1" 404 196
Edit: PHP Modules
[jbusch@openemr ~]$ php -m
[PHP Modules]
bz2
calendar
Core
ctype
curl
date
dom
exif
fileinfo
filter
ftp
gd
gettext
hash
iconv
imagick
json
ldap
libxml
mbstring
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
pdo_sqlite
Phar
posix
readline
Reflection
session
shmop
SimpleXML
soap
sockets
SPL
sqlite3
standard
sysvmsg
sysvsem
sysvshm
tokenizer
xml
xmlreader
xmlwriter
xsl
zip
zlib
[Zend Modules]