Drupal Canvas Editor route errors out when rendered as custom elements

Problem

When pressing "Edit" on the frontend of a canvas page, one is redirected to a page like /canvas/editor/canvas_page/1 on the frontend. However that fails since the ce-api of this page results in that error:

The website encountered an unexpected error. Try again later.<br><br><em class="placeholder">LogicException</em>: Render context is empty, because render() was called outside of a renderRoot() or renderPlain() call. Use renderPlain()/renderRoot() or #lazy_builder/#pre_render instead. in <em class="placeholder">Drupal\Core\Render\Renderer-&gt;render()</em> (line <em class="placeholder">219</em> of <em class="placeholder">core/lib/Drupal/Core/Render/Renderer.php</em>). <pre class="backtrace">Drupal\canvas\Controller\CanvasController-&gt;buildHtml() (Line: 129)
Drupal\canvas\Controller\CanvasController-&gt;__invoke() (Line: 183)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle() (Line: 53)
Drupal\Core\StackMiddleware\Session-&gt;handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength-&gt;handle() (Line: 104)
Drupal\lupus_decoupled_ce_api\BackendApiRequest-&gt;handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength-&gt;handle() (Line: 116)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass() (Line: 90)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle() (Line: 53)
Asm89\Stack\Cors-&gt;handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle() (Line: 53)
Drupal\Core\StackMiddleware\AjaxPageState-&gt;handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel-&gt;handle() (Line: 715)
Drupal\Core\DrupalKernel-&gt;handle() (Line: 19)
</pre>

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes