Cyclic inheritance causes UI to crash

[w1ll-i-code]

Expected Behavior

If I have accidentally created a cyclic inheritance, I expect an error message and the possibility to resolve the issue in the UI directly.

Current Behavior

If I try to access an object with cyclic inheritance, the UI crashes and I can't edit it to resolve the issue

Possible Solution

Check for cyclic inheritance when loading an object for editing in the UI

Steps to Reproduce (for bugs)

• Create a host template
• Create a second host template, inheriting from the fist
• change the first template to inherit from the second
• A warning is shown that a cyclic dependency is detected
• trying to access any template to resolve the issue results in an error page

Your Environment

• Director version (System - About): 1.11.0
• Icinga Web 2 version and modules (System - About): 2.10.5
• Icinga 2 version (icinga2 --version): r2.14.0-1
• Operating System and version: rhel 8.9
• Webserver, PHP versions: 7.4.33