scheduledreport: test failed Cannot connect to web service couldn't connect to server

[Israe]

hello, fairely new to zabbix, using it to monitor my workplace infra, everything works fine. now I want to start generating reports. although i followed everything as it is on the doc i still get this error

Report generating test failed.
Cannot connect to web service: couldn't connect to server
​

• zabbix server (6.0 LTS), the database (mysql) and the web gui are all installed on the same VM on centos 8 stream without gui
• I access, manage and administrate from my computer through ssh to the server and access the web gui through https://server_ip/zabbix
• all traffic needed is allowed on firewall
• I installed google-chrome-stable and the zabbix-web-service and configured it as it says (http://server_ip:10053/report)
• on zabbix gui I added the Frontend URL https://server_ip/zabbix

I went through all the combinations of @ip, localhost, 127.0.0.1 between the server and the web-service and still get the same error, I also tried chromium and nothing

• from the server I tried curl -v http://server-ip:10053/report and i got

*   Trying ip@...
* TCP_NODELAY set
* Connected to ip@ (ip@) port 10053 (#0)
GET /report HTTP/1.1
Host: ip@:10053
User-Agent: curl/7.61.1
 Accept: */*
HTTP/1.1 405 Method Not Allowed
Content-Type: application/problem+json
X-Content-Type-Options: nosniff
Date: Tue, 07 Feb 2023 14:35:16 GMT
Content-Length: 38
{"detail":"Method is not supported."}
* Connection #0 to host ip@ left intact

did anyone have this problem and is there a solution? normally it should work because everything is on the same VM!!

[Israe]

Solved but not sure how; but in case anyone is having the same problem and still struggling to find a solution, here's what i tried:

• SSL: Certification issue
  • I kept checking if the Certification location files are correct at /etc/zabbix/zabbix_server.cong
• Added the IP address used in frontend
  • /etc/zabbix/zabbix_web_service.conf: AllowedIP=x.x.x.x
• URL: At the server configuration file level, tried different combinations of using IP@, localhost or 127.0.0.1 like in
  • WebServiceURL=http://Used_Address:10053/report instead of localhost
  • Same for the URL on the frontend
• the problem persisted so i tried both google-chrome, and chromium. although when it worked i was using google-chrome headless installation.
• after all these steps I still get Cannot connect so I did a simple '#yum update' and restarted everything
  • sudo systemctl status zabbix-server zabbix-agent zabbix-web-service httpd php-fpm
• I then refreshed the frontend and finally the Cannot connect to server error was replaced by multiple google and web service permission errors, which meant that is connected at least
• all I did after is configure the permissions depending on what I got and Finally I tested and it was successful.

I never really got a solution from these forums but I hope this helps someone else.