Website does not show the map note if the creator (user) does not exist

[yellow-wood]

The hyperlink https://www.openstreetmap.org/note/2912641 makes the website show the message "Application error".

The hyperlink https://www.openstreetmap.org/user/refraktivcom makes the website show the message "The user refraktivcom does not exist".

The information about the map note:

<note id="2912641" lat="48.7855867" lon="9.1833955" created_at="2021-10-27T18:02:48Z">
  <comment action="opened" timestamp="2021-10-27T18:02:48Z" uid="14360503" user="refraktivcom">Test</comment>
</note>

[tomhughes]

Duplicate of #2146.