Error: We couldn't refresh because your data gateway (Power BI – personal) is offline...

I'm using the Desktop Power BI to publish a Web datasource to the service. When I try to refresh though I get this error:

We couldn't refresh because your data gateway (Power BI – personal) is offline. Make sure your computer is on and the gateway is up and running.

Here's my query:

let
    Source = Xml.Tables(Web.Contents("http:///api/someapi?someelement=value")),
    Table1 = Source{1}[Table],
    Table0 = Table1{0}[Table],
    #"Changed Type" = Table.TransformColumnTypes(Table0,{{"element", type text}, {"element", type text}, {"quality", type text}, {"Attribute:description", type text}}),
in
    #"Renamed Columns1"