Hi @Heino Sass Hallik ,
not sure if the screenshot shows the exact detail. In my opinion it's the name of the storage account alldevicenotify
that is marked red/invalid.
If so please check if the name of the storage account is unique. In a lot of cases the issue is a storage account name that is already in use.
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten