Power Query - Number must be either non-negative and less than or equal to Int32.MaxValue or -1.

Thank you lbendlin you are a legend! That solved it 🙂

each List.IsEmpty([Result]) <> true,

let
    List = List.Generate(()=>
//Where to start and which page we are on //if error we want it to return a null (Try)
[Result = try fJobsPosts(1) otherwise null , Page = 1],
//We want this to keep running until the result is null
each  List.IsEmpty([Result]) <> true,
//condition for creating the row and itterate throug until it is null
each [Result = try fJobsPosts([Page]+1) otherwise null , Page = [Page] + 1],
// create the output
each [Result]),

    #"Converted to Table" = Table.FromList(List, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
    #"Expanded Column1" = Table.ExpandListColumn(#"Converted to Table", "Column1"),
    #"Expanded Column2" = Table.ExpandRecordColumn(#"Expanded Column1", "Column1", {"id", "active", "live", "first_published_at", "title", "location", "internal", "external", "job_id", "content", "internal_content", "updated_at", "created_at"}, {"id", "active", "live", "first_published_at", "title", "location", "internal", "external", "job_id", "content", "internal_content", "updated_at", "created_at"}),
    #"Expanded location" = Table.ExpandRecordColumn(#"Expanded Column2", "location", {"name"}, {"Location"}),
    #"Changed Type" = Table.TransformColumnTypes(#"Expanded location",{{"updated_at", type datetime}, {"created_at", type datetime}, {"first_published_at", type datetime}}),
    #"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"title", "Job Title"}, {"first_published_at", "First Published"}, {"id", "Job Post ID"}, {"active", "Active"}, {"live", "Live"}, {"internal", "Internal"}, {"external", "External"}, {"content", "Job Content"}})
in
    #"Renamed Columns"

Thanks so much for your help 🙂