"Problems" with Web Scenario and triggers

[GraveSkull]

Friends, good afternoon.

I have a problem with the Zabbix Web Scenario tests.

The configuration of Web Scenario:
Update Interval: 2m
Agent: Zabbix
Steps:
Name: Site to be monitored
URL: URL to be monitored
Retrieve mode: Body
TimeOut: 60s
Required String: String Required
Status codes: 200

Trigger configuration: {TEMPLATE: web.test.fail [NAME] .last ()} <> 0

What happens? At all times the trigger reports that the monitored site is in error, but when doing manual tests the site is ok.

I checked the Nginx and PHP-FPM logs, but no errors were found.

So I came to the conclusion that the error can only be in Web Scenario and Trigger.

Any suggestions on what I can do?

[Singularity]

Check the status code response in the trigger like {TEMPLATE:web.response_code_for_step.last()} <> 200.
When we use web scenario, few items are auto-created by zabbix. Choose the status response code item in the trigger and compare the value.
There are also other ways to check that there is no error for the steps you described like {TEMPLATE:web.Failed_step_of_scenario.last()} <> 0.