Navigation: Argument 1 passed to ipl\Web\Widget\Icon::_construct() must be of type string, null given

[K0nne]

Describe the bug

We use shared navigation. One user shares a navigation structure with all other users. Since our switch to "icingadb-web" this behaviour occured. With the "monitoring" module, this did not happen.

To Reproduce

Provide a link to a live example, or an unambiguous set of steps to reproduce this issue. Include configuration, logs, etc. to reproduce, if relevant.

1. Click on an navigation item with sub-entries to expand
2. the error occures reproduceable

Expected behavior

If you click on a navigation item with sub entries, it expands and on the right side of the ui it souldn't expect a parameter for the right side.

Screenshots

Your Environment

Include as many relevant details about the environment you experienced the problem in.

• Icinga DB Web version (System - About): 1.1.2
• Icinga Web 2 version (System - About): 2.12.1
• Web browser: edge
• Icinga 2 version (icinga2 --version): 2.13.9
• Icinga DB version (icingadb --version): 1.2.0
• PHP version used (php --version):7.2.24
• Server operating system and version: rhel8

[nilmerg]

Duplicate of #5177