No Shipping Methods Available

The shipping methods you have enabled must have a country restriction set.

Here is what I have set in WooCommerce settings:
General tab – Selling Location(s)=Sell to all countries
Shipping tab – Shipping Options>Shipping Methods=Free Shipping
In the Free Shipping I have Method Availability=All allowed Countries (NOTE: I assume this means all countries, unless there is another place to set that up I am not aware of)

Some background: we are a small clinical lab that sells our testing to the general public on our website if they choose to. WE must collect their shipping address so we can ship them the test kit they complete at home, then ship back the sample to our lab. Shipping is actually included in the price of the test, so we do not charge a separate shipping amount…not yet, anyway.

Ok, I figured it out…and I hope this works for all our website visitors.

I went into the General tab and set Selling Locatons = Sell to specific countries only
For Specific Countries, I selected All which added all the countries of the world (at least I think it is all the countries of the world…it is a very large list)

I now do not receive the “There are no shipping methods available. Please double check your address, or contact us if you need any help.” message when selecting ANY country to ship to.