Connection to specific folder of blob using SaS Token

[danielPrieto]

I have generated a SaS token at directory level but when I try to connect from PowerBI desktop and enter the url at directory level I get the following error:

It seems to work correctly if the url is at container level "https://myblobnametest.blob.core.windows.net/mycontainer" but, in that case, isn't it possible to use SaS token at directory level?

Thanks

Thanks