how to create a query that paginates?

I am looking for a pagination solution too, and I am almost there but not quite....!

here is my code (and it feels very close):

let
    baseURL = "https://api.vworkapp.com/v4/jobs.xml",
    apiKey = "?api_key=xxxxxxxx",
    params = "&start_at=2018-10-15&end_at=2018-10-16",
    perPage = "&per_page=200",
     
    queryURL = baseURL & apiKey & params & perPage,
 
    PreFetchData = Xml.Tables(Web.Contents(queryURL)),
    PageCount = Number.FromText(PreFetchData{0}[#"Attribute:total_pages"]),
 
    GetPageData = (Index) =>
        let
            XMLData = Xml.Tables(Web.Contents(queryURL & "&page=" & Index))
        in
            XMLData,

    Data = List.Generate ( () =>
        [i=1],
        each [i] < PageCount,
        each [   
            i=[i]+1, 
            ResList = GetPageData(
                Number.ToText([i])
            )
        ],
        each [ResList]
    )
in
    Data 

What this gets me is:

The Table records are spot on, I can expand those and they are exactly what I want, but there is an error in the first list item and I can't figure out why:

I can't seem to get past this error, can anyone put me on the right track to solving why i=1 would be a problem? The api accepts page=1 so I don't see what would be wrong....

EDIT: I have skipped over that row and everything else after that works as expected, so if I solve why i=1 is an issue then I am done!