[Dynamic source] Can't set scheduling despite using relative path in M-Code

Question

let  
	Source = Json.Document(Web.Contents("https://api.keyedinprojects.co.uk/V3/api",[RelativePath="report?key=771"])),  
  BaseUrl = "https://api.keyedinprojects.co.uk/V3/api/report?key=771",  
    
        GetJson = (Url) =>  
        let RawData = Web.Contents(Url),  
            Json = Json.Document(RawData)  
        in  Json,  
  
        GetTotalEntities = (Page) =>  
        let Total = Page[TotalPages]  
        in  Total,  
		  
		GetUrl = (Index) =>  
        let Url   = BaseUrl & "&pageNumber=" & Text.From(Index)  
        in  Url, //used in urls  
		  
        GetPage = (Index) =>  
        let Url   = GetUrl(Index),  
            Json  = GetJson(Url)  
        in  Json, //used in pages  
  
    FirstPage = GetPage(1), //this is where we see our first json file   
	  
    EntityCount = GetTotalEntities(FirstPage), //1 page only   
  
    PageIndices = { 1 .. EntityCount }, //gives a list {} returns a list  
  
    URLs        = List.Transform(PageIndices, each GetUrl(_)),  
    Pages       = List.Transform(PageIndices, each GetPage(_)[Data]),  
  
    Data = List.Union(Pages),  
  
    TblFromList = Table.FromList(Data, Splitter.SplitByNothing(), null, null, ExtraValues.Error),  
    ExpandedCols = Table.ExpandRecordColumn(TblFromList, "Column1", {"Project Code", "Project Name", "Project Owner", "Business Unit name", "Project Type", "PMO status", "FA number (General tab)", "Date Standstill Period Ends", "PMO closed down date", "PSC Action -  Date MGT records set up  (TA Relevant)", "ITN/RfP Submission Deadline", "PQQ Submission Deadline", "Closure", "Closure "}, {"Project Code", "Project Name", "Project Owner", "Business Unit name", "Project Type", "PMO status", "FA number (General tab)", "Date Standstill Period Ends", "PMO closed down date", "PSC Action -  Date MGT records set up  (TA Relevant)", "ITN/RfP Submission Deadline", "PQQ Submission Deadline", "Closure", "Closure "}),  
  
    //Replaced blank pmo dates with today  
  #"Changed Type" = Table.TransformColumnTypes(  
    ExpandedCols,   
    {  
      {"PSC Action -  Date MGT records set up  (TA Relevant)", type date},   
      {"ITN/RfP Submission Deadline", type date},   
      {"PMO status", type text},   
      {"Project Type", type text},   
      {"Business Unit name", type text},   
      {"Project Owner", type text},   
      {"Project Name", type text},   
      {"Project Code", type text},   
      {"FA number (General tab)", type text},   
      {"Date Standstill Period Ends", type date},   
      {"PMO closed down date", type date},   
      {"Closure", Int64.Type},   
      {"PQQ Submission Deadline", type date}  
    }  
  ),  
    SS_StandStillNotNull = Table.SelectRows(  
    #"Changed Type",   
    each ([Date Standstill Period Ends] <> null)  
  ),  
    NotCapProc = Table.SelectRows(  
    SS_StandStillNotNull,   
    each not Text.Contains([Project Type], "Capital Procurement Projects")  
  ),  
    SS_AfterApr2021 = Table.SelectRows(NotCapProc, each [Date Standstill Period Ends] > #date(2021, 4, 1))  
in  
    SS_AfterApr2021  
  //Replaced blank pmo dates with today                                       

I used relative path as per my research but it still gives the error of dynamic source. The data is being pulled correctly but I can't seem to set a refresh.