Cannot delete my comments in public poll (User without Account)

[TaoTePuh]

To Reproduce
Steps to reproduce the behavior:

1. Add new Poll.
2. Add a public link.
3. Visit the public link.
4. Choose "No, I have no login".
5. Write a comment.
6. Try to delete the comment.
   => "Error while deleting the comment"

Information about your polls installation

Polls version?
1.5.4

Update from a prior version?
1.5.3

How did you install this version?
Appstore

Information about your Instance of Nextcloud/ownCloud

Nextcloud or ownCloud?
Nextcloud

Nextcloud/ownCloud version:
19.0.4

Logs

Nextcloud log

[index] Error: Exception: Call to a member function getUID() on null at <<closure>>

0. /var/www/nextcloud/lib/private/AppFramework/App.php line 137
   OC\AppFramework\Http\Dispatcher->dispatch(OCA\Polls\Controller\CommentController {}, "delete")
1. /var/www/nextcloud/lib/private/AppFramework/Routing/RouteActionHandler.php line 47
   OC\AppFramework\App::main("OCA\\Polls\\Con ... r", "delete", OC\AppFramework\ ... {}, {commentId: "25" ... "})
2. <<closure>>
   OC\AppFramework\Routing\RouteActionHandler->__invoke({commentId: "25" ... "})
3. /var/www/nextcloud/lib/private/Route/Router.php line 297
   call_user_func(OC\AppFramework\ ... {}, {commentId: "25" ... "})
4. /var/www/nextcloud/lib/base.php line 1011
   OC\Route\Router->match("/apps/polls/comment/25")
5. /var/www/nextcloud/index.php line 37
   OC::handleRequest()

DELETE /index.php/apps/polls/comment/25
from xxx  at 2020-10-09T22:33:19+00:00

[dartcafe]

Using DELETE seems to ignore the payload.

[github-actions]

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