Frontend: Uncaught TypeError: Cannot read property 'header' of null

Created on 7 Aug 2020 · 4Comments · Source: home-assistant/frontend

Checklist

[ X ] I have updated to the latest available Home Assistant version.
[ X ] I have cleared the cache of my browser.
[ X ] I have tried a different browser to see if it is related to my browser.

The problem

Error thrown in browser when navigating to dev tools

2020-08-07 13:41:29 ERROR (MainThread) [frontend.js.latest.202007160] http://<my.ip.address:8123>/frontend_latest/chunk.cf565e41b8a8dce0642a.js:133:238 Uncaught TypeError: Cannot read property 'header' of null

Expected behavior

No browser errors / no home assistant errors

Steps to reproduce

Provide steps for us, that helps reproducing your issue.
For example:
1. Open developer tools
2. Select any tab
3. Select 'States' tab
Note: seems to also error when selecting any tab in dev tools, but the above is a sure fire way to reproduce

Environment

Home Assistant release with the issue: 0.113.3
Last working Home Assistant release (if known): unknown
Browser and browser version: Microsoft Edge 84.0.522.40 (Official build) (64-bit)
Operating system: Windows 10

Error also occurs when navigating to the states dev tool via mobile app

Mobile App Version: 2.1.0.239-full
Android Version 10.
OnePlus 7 Pro OxygenOS 10.0.7

Error also occurs when navigating to the states dev tool on mobile web browser Brave

Brave browser version: Beta 1.12.106
Brave browser version: Stable 1.11.105

State of relevant entities

N/A

Problem-relevant configuration

N/A

Javascript errors shown in your browser console/inspector

chunk.cf565e41b8a8dce0642a.js:1085 Uncaught TypeError: Cannot read property 'header' of null
    at HTMLElement.value (chunk.cf565e41b8a8dce0642a.js:1085)
    at g.handleEvent (app.5aafc0f2.js:1)
    at HTMLElement.__boundHandleEvent (app.5aafc0f2.js:1)
    at HTMLElement.fire (app.5aafc0f2.js:1)
    at HTMLElement._itemActivate (chunk.582a2968cc36c6302d0b.js:1)
    at HTMLElement._activateHandler (chunk.582a2968cc36c6302d0b.js:1)
    at HTMLElement._activateHandler (chunk.582a2968cc36c6302d0b.js:1)
    at HTMLElement._activateHandler (chunk.3c74f20a8b5ae6c404d8.js:1016)
    at HTMLElement.<anonymous> (app.5aafc0f2.js:1)
    at R (app.5aafc0f2.js:1)

  value @ chunk.cf565e41b8a8dce0642a.js:1085
  handleEvent @ app.5aafc0f2.js:1
  __boundHandleEvent @ app.5aafc0f2.js:1
  fire @ app.5aafc0f2.js:1
  _itemActivate @ chunk.582a2968cc36c6302d0b.js:1
  _activateHandler @ chunk.582a2968cc36c6302d0b.js:1
  _activateHandler @ chunk.582a2968cc36c6302d0b.js:1
  _activateHandler @ chunk.3c74f20a8b5ae6c404d8.js:1016
  (anonymous) @ app.5aafc0f2.js:1
  R @ app.5aafc0f2.js:1
  M @ app.5aafc0f2.js:1
  click @ app.5aafc0f2.js:1
  A @ app.5aafc0f2.js:1