zabbix fails when clicking next

[fazabb]

Hi there,
sorry for this newbie question, I have been trying to fix this and am aware that a similar quesiton has been asked before, but I couldn't yet fix it after many hours.

web gui is starting, but apache logs are already showing some errors when I load it (3 lines) and when I click "next step" more appear.
As for the browser, all I know is that the window returns a status 500 with
This page isn’t working
<ip> is currently unable to handle this request.

...can anyone point me in the right direction?

thank you all in advance for your patience

[fazabb]

Here is the part 1of 4 of the log .
Uploading it bit by bit as it's raising errors trying to post it.

[Mon Jul 11 00:31:52.919395 2022] [php:warn] [pid 8186] [client 192.168.1.152:50387] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/setup/CSetupWizard.php on line 413
[Mon Jul 11 00:31:52.919699 2022] [php:warn] [pid 8186] [client 192.168.1.152:50387] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/setup/CSetupWizard.php on line 414
[Mon Jul 11 00:31:52.946154 2022] [php:warn] [pid 8186] [client 192.168.1.152:50387] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/core/CCookieSession.php on line 194
[Mon Jul 11 00:32:01.905143 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/validate.inc.php(107) : eval()'d code on line 1, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.905299 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/validate.inc.php on line 334, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.907658 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 586, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.907784 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 587, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.907922 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 588, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908070 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 586, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908151 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 587, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908319 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 588, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908460 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 586, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908540 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 587, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908669 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 588, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908809 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 586, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.908890 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 587, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909019 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 588, referer: http://192.168.1.167/zabbix/setup.php

[fazabb]

log part 2of4

[Mon Jul 11 00:32:01.909158 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 586, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909239 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 587, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909368 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 588, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909508 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 586, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909588 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 587, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909718 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 588, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909857 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 586, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.909963 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 587, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.910093 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/validators/CApiInputValidator.php on line 588, referer: http://192.168.1.167/zabbix/setup.php

[fazabb]

log part 3of4 (the one Fatal Error amongst many many Warnings)

[Mon Jul 11 00:32:01.910386 2022] [php:error] [pid 8185] [client 192.168.1.152:50386] PHP
Fatal error: Uncaught APIException: Invalid parameter "/output":
value must be empty or one of "", "", "", "", "", "". in /usr/share/zabbix/include/classes/api/CApiService.php : 887\nStack
trace:\n#0 /usr/share/zabbix/include/classes/api/services/CSettings.php(108):
CApiService::exception()\n # 1
/usr/share/zabbix/include/classes/helpers/CSettingsHelper.php (105):
CSettings->getGlobal()\n # 2
/usr/share/zabbix/include/classes/helpers/CSettingsHelper.php(128):
CSettingsHelper: :loadParams()\n # 3
/usr/share/zabbix/include/page_header.php(86):
CSettingsHelper: :getGlobal()\n # 4
/usr/share/zabbix/include/validate.inc.php(371):
require_once('...')\n # 5
/usr/share/zabbix/include/validate.inc.php(431):
invalid_url() \n # 6
/usr/share/zabbix/setup.php(76):
check_fields()\n # 7
{ main } \n thrown in /usr/share/zabbix/include/classes/api/CApiService.php on line 887,
referer: http://192.168.1.167/zabbix/setup.php

[fazabb]

log part 4of4

[Mon Jul 11 00:32:01.910935 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Undefined array key "file" in /usr/share/zabbix/include/classes/debug/CProfiler.php on line 381, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.910991 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Undefined array key "line" in /usr/share/zabbix/include/classes/debug/CProfiler.php on line 381, referer: http://192.168.1.167/zabbix/setup.php
[Mon Jul 11 00:32:01.911041 2022] [php:warn] [pid 8185] [client 192.168.1.152:50386] PHP Warning: Trying to access array offset on value of type null in /usr/share/zabbix/include/classes/core/CCookieSession.php on line 194, referer: http://192.168.1.167/zabbix/setup.php

[fazabb]

Gotcha, I better use something else...

[DimmKo]

Hello.
Sorry for my bad English!

I installed php8.1-cgi and this help for me.

My commands:
sudo aptitude install php8.1-cgi
sudo systemctl restart apache2

and I was clean all cache from browser.