problem while creating trigger Zabbix 5.4

[Dr759123]

Tell me what I'm doing wrong?

[Dr759123]

Thank you for such a high-quality answer.

[cyber]

For 5.4 its
function(/host/key,parameter).
and you don't have str() function any more in 5.4.. there is find()
I don't have 5.4 at hand but it may look like
find(/debianZabbix/log[/var/log/auth],"like","Failed login for")=1
There is "Add" button, use it. It helps to avoid simple mistakes in expressions, and shows you correct syntax also...
EDIT: and you have typo in trigger name also ... it should be {HOST.NAME} not {HOSTS.NAME}