Frontend is spamming JS Errors and is unresponsive

[tbe]

Summary

During investigation, why my frontend is nearly unresponsive, i found that the console is spammed with the same error hundreds of thousands of times.

Steps to reproduce

1. open the web frontend
2. open the debug console

Expected results

No errors are shown

Actual results

Thousands of entries of the following error are coming in fast:

elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1 Uncaught TypeError: Cannot read properties of undefined (reading 'childNodes')
    at r (elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:17059)
    at r (elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:17155)
    at r (elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:17003)
    at r (elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:17155)
    at pe (elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:17219)
    at he (elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:17281)
    at elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:18977
    at u (elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1:19200)
r @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1
r @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1
r @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1
r @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1
pe @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1
he @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1
(anonymous) @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1
u @ elm.min.js?id=4cc190d182e8937425c3906723f3b82a:1

Additional context

Clicking on any link does not have any effect. If i directly request the page (F5, copy paste, ...) the page is shown, but not all widgets work. This can be another issue, not sure

Triaging info

• Concourse version: 7.11.0
• Browser (if applicable): Google Chrome 118.0.5993.88 on linux
• Did this used to work? Yes, but i can not say what time it broke.