Unconfirmed Warehouse doesn't open, when clicking on it. [SOLVED]

[Thalassius]

[B]Ingame Nick[/B]: Thalassius.
[B]Affected world(s)[/B]: 12.
[B]Browser[/B]:

Firefox LTS.
[B]Reproduction steps[/B]:
[LIST=1]
Just click on it.
[/LIST]
[B]Detailed error description (What you see)[/B]:
And nothing happens.

Workaround: Of course, these infos can always be found, at the related wiki's sections.