@Rini Braat ,
using a different browser, might not solve the issue. Did you try to create a storage account in a different region? (I checked Azure status, I don't see any storage service downtime across regions - https://status.azure.com/en-us/status/history/).
The other option might be that you may not have the necessary permissions on your subscription to create a storage account. In order to be able to create a storage account, you will need at least Storage Account Contributor RBAC permissions at the subscription level.
https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#storage-account-contributor
https://learn.microsoft.com/en-us/azure/role-based-access-control/role-assignments-portal?tabs=current