There is no php_error.log on the system. However, /var/log/apache2/error.log shows errors trying to do something with IonCube:
Failed loading /usr/lib/php/7.4/20121212/ioncube_loader_lin_7.4_ts.so: /usr/lib/php/7.4/20121212/ioncube_loader_lin_7.4_ts.so: undefined symbol: core_globals_offset
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IonCube extensions in /etc/php/7.4/apache2/php.ini
zend_extension = /usr/lib/php/7.4/20121212/ioncube_loader_lin_7.4.so
zend_extension = /usr/lib/php/7.4/20121212/ioncube_loader_lin_7.4_ts.so
extension=php_gmp.so
Regarding extension=php_gmp.so, /var/log/apache2/error.log shows this error:
PHP Warning: PHP Startup: Unable to load dynamic library 'php_gmp.so' (tried: /usr/lib/php/20190902/php_gmp.so (/usr/lib/php/20190902/php_gmp.so: cannot open shared object file: No such file or directory), /usr/lib/php/20190902/php_gmp.so.so (/usr/lib/php/20190902/php_gmp.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
I don't know if I even need extension=php_gmp.so. Someone said it is needed, but someone else on the same help page said it isn't needed.
7.4.so does not create an error
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Also, /var/sentora/logs/domains/brad/bradmarple.com-error.log shows a bunch of errors:
http://bradmarple.com/bradmarple.com-error.log
---------------------------------------------
Environment:
Welcome to Ubuntu 20.04.5 LTS (GNU/Linux 5.4.0-132-generic x86_64)
* Documentation:
https://help.ubuntu.com
* Management:
https://landscape.canonical.com
* Support:
https://ubuntu.com/advantage
System information as of Mon 21 Nov 2022 06:51:56 AM EST
System load: 0.12 Processes: 179
Usage of /: 24.2% of 37.23GB Users logged in: 0
Memory usage: 34% IPv4 address for eth0: 5.161.149.225
Swap usage: 0% IPv6 address for eth0: 2a01:4ff:f0:e460::1
----------------------------------
PHP version: 7.4.3
I don't know if this has any bearing, but I am using the Sentora.org 2.0 hosting environment. For years I have used SeoToaster on their 1.0.3 version on another server with no problems. The current issue is a new installation on a new server.
I am sorry for such a lengthy response, but hopefully it will help you help me!