@Charles Anthony I believe you are referring to the solutions/causes mentioned here in the documentation of classic studio?
Have you tried the import data wizard from the import data module if the above error was seen while using the import data module?
You can test the basic connection to your container and then provide path to your datafile in the next steps.
If there is an access/permission issue you can correct it from the storage explorer and then try again.
@Charles Anthony Good to hear the same. It would be great to accept my above response as answer if it helped resolved the issue for you. Thanks!!