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Hello Zabbix Support Team,

I'm currently testing Telegram integration using the webhook method in Zabbix 7.4.0beta1, and I'm encountering some issues that I couldn't resolve with the current documentation.

The issues are as follows:

1. Invalid JSON Error: When using the macro {{ {EVENT.TAGSJSON}}} in the message template, I receive the following error during the test:
    
    
   Sending failed: Webhook processing failed: Value "event_tags" contains invalid JSON.
   However, if I replace {{{EVENT.TAGSJSON}

   }} with a hardcoded value like [\{"tag":"test","value":"test"}], the test succeeds, and the message is delivered to Telegram.

1. Unauthorized Error: Before that, I also faced:
    

{{

{"ok":false,"error_code":401,"description":"Unauthorized"}

}}
I corrected the bot token and confirmed it's working, as I can send messages using hardcoded values.

Steps to reproduce:

1. Changes in configuration...
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3. Click on screen element...
4. ...

Result:
See screenshot...
See log file...
See memory dump...
Expected:
See screenshot....
See attached patch file...