Steps to reproduce:

1. Navigate to Configuration => Hosts => Triggers.
2. Select some triggers and click Mass update button.
3. Click the Dependencies tab.
4. Click Add.
5. Select any trigger.
6. Observe the trigger has been added to the list.
7. Click the trigger in the list (it's a link).

Result:

Navigation happens and error message is displayed: Field "context" is mandatory.

Expected:

Trigger editing form is displayed (as in Zabbix 5.0).