Steps to reproduce:

1. Open two tabs with Zabbix
2. In first tab go to Data Collection -> Hosts
3. In second tab log out of that user
4. In first tab select a Host to open edit form
5. When opening form and have logged out in different tab, you get an error

 

Result:
You get error Unable to load settings API parameters
Expected:
Display error message, that user is not logged in