The account being accessed does not support http with BLOB SAS URL in Azure

The following error occurred in my web browser when trying to download a file from my Azure Blob Storage:

<Error>
<Code>AccountRequiresHttps</Code>
<Message>
The account being accessed does not support http. RequestId:94de06e3-c01e-000e-4aad-f7c76c000000 Time:2019-04-19T19:18:03.2680382Z
</Message>
<AccountName>storageaccount158</AccountName>
</Error>

This error was unexpected, since I had allowed HTTP at the creation of my blob SAS token and URL:

The solution is quite easy (once you know 😉 ).
You need to enable Insecure transfers in the Confguration of your Storage Account. To do so,

1. Go to your Storage Account (top level) in Azure
2. Go to Settings – Configuration
3. Set “Secure transfer required” to “Disabled“
4. Click Save
5. Retry to access the URL. The file can now be accessed.

More information about Authorization with SAS can be found here:
https://docs.microsoft.com/en-us/azure/storage/common/storage-dotnet-shared-access-signature-part-1