Uncaught typerror; check if elements in javascript an item before checking a level deeper

[Thomasvdh92]

Im getting the following exception in my browser console:

Uncaught TypeError: can't access property "classList", element is null
    visible http://localhost/static/debug_toolbar/js/utils.js:40
    init http://localhost/static/debug_toolbar/js/toolbar.js:31
    on http://localhost/static/debug_toolbar/js/utils.js:7
    on http://localhost/static/debug_toolbar/js/utils.js:4
    init http://localhost/static/debug_toolbar/js/toolbar.js:24
    <anonymous> http://localhost/static/debug_toolbar/js/toolbar.js:400
[utils.js:40:16](http://localhost/static/debug_toolbar/js/utils.js)
    visible http://localhost/static/debug_toolbar/js/utils.js:40
    init http://localhost/static/debug_toolbar/js/toolbar.js:31
    on http://localhost/static/debug_toolbar/js/utils.js:7
    (Async: EventListener.handleEvent)
    on http://localhost/static/debug_toolbar/js/utils.js:4
    init http://localhost/static/debug_toolbar/js/toolbar.js:24
    <anonymous> http://localhost/static/debug_toolbar/js/toolbar.js:400

I can't seem to trace down why this is happening, neither have I found similar problems here. The toolbar itself is visible, however, clicking on items seems to result in this error.

[tim-schilling]

@Thomasvdh92 could you try creating a reproducible environment please? If you can include your browser, django version, toolbar version that will also help.