Guid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).2008-12-05T21:02:09.9624179ZSystem.FormatExceptionGuid should contain 32 digits with 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).mscorlib at System.Guid..ctor(String g) at Xero.API.Web.Controllers.InvoiceController.Get(String apiKey, String xeroKey, String invoiceID, String invoiceNumber) in D:\Projects\network\project\Xero.API.Web\Controllers\InvoiceController.cs:line 37225ad11e-601e-4e2a-bdb1-48e8517efbb3InternalServerErrorYOUR PROVIDER2008-12-05T21:02:09.9467897Z