Same error
// Set the request authentication headers
RequestHeader("Accept"

= "application/json"
RequestHeader("Content-Type"

= "application/json"
RequestHeader("Cookie"

= inSessionID
Dim url As Text = inHost + inSQLURL
// Prepare data
Dim dict As New Dictionary
dict.Value("vendor"

= inSQLVendor.ReplaceAll(Text.FromUnicodeCodepoint(&hFEFF ),""

dict.Value("database"

= inSQLDatabase.ReplaceAll(Text.FromUnicodeCodepoint(&hFEFF ),""

dict.Value("query"

= inQuery.ReplaceAll(Text.FromUnicodeCodepoint(&hFEFF ),""
Dim json As Text = Xojo.Data.GenerateJSON(dict)
Dim data As MemoryBlock = Xojo.Core.TextEncoding.UTF8.ConvertTextToData(json)
SetRequestContent(data,"application/json"
// Send the POST request
Send("POST",url)