@Sander van de Velde Thanks for the confirmation.
@KLid I understand that you are following the learning page and facing this issue. I tried following the tutorial and not observing such issues.
You have mentioned, Also, when deleting the Iot Hub and creating a new one , the problem still remains. did you try deleting entire resources? If not, please delete the resource group completely and start resource creation again and see if it helps.
@JÖRG STRIEBEL @Schavuit Are you still blocked? Could you share the region on which you have created the resources?