Azure Storage Explorer - 403

This has recently started happening to me on a frequent basis. I open Azure Storage Explorer, open up my sub down to the blob container level and it throws an error (which is quite a long piece of JSON)

This request is not authorized to perform this operation.

This storage account's 'Firewalls & virtual networks' settings may be blocking access to storage services. Try adding your client IP address to the firewall exceptions, or by allowing access from 'all networks' instead of 'selected networks'. To learn more about Azure Storage firewalls and virtual networks, visit http://go.microsoft.com/fwlink/?LinkId=845443.

Error Details:
{
  "name": "RestError",
  "code": "AuthorizationFailure",
  "statusCode": 403,
.......(removed the rest for brevity)}

There is a really important hint here, and I ignored it initially because I know best ha ha ha.

 Try adding your client IP address to the firewall exceptions

To do this, open portal.azure.com

Go to your storage account, and in the menu go to the Security & Networking section, and then choose Networking.

Click Manage for "Public Network Access" (notice mine says Disabled)

Click to Enable public networks and then Enable from selected networks. You could do from all networks, but would be more vulnerable to attack. My IP address has already been filled into the IP address box (I've blurred it out). Then Click Save.

There are various other settings on here which you may want to investigate. I would also caution that opening up any holes in the network can lead to a larger attack area. Be careful, and always choose the most safe option and get advice if you're not sure about anything.

Once saved, Storage Explorer should start working again.