escalation level doesn't work

[ryanto21]

Hi everyone,

I need help, i am using glpi 9.4.4 with Escalation plugin v. 2.4.3 in centos 7, i have add an escalation level and the action is put watcher in the ticket went the ticket is out of time, but the process doesn't work.
how can this happen and what solution should i do to fix it?

Thank you

Best Regarads,