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I could not figure out why I kept on getting the following error being returned :

< ?xml version="1.0" encoding="utf-8"? >

Error

E00003
The ‘AnetApi/xml/v1/schema/AnetApiSchema.xsd:validationMode’ element is invalid – The value ” is invalid according to its datatype ‘AnetApi/xml/v1/schema/AnetApiSchema.xsd:validationModeEnum’ – The Enumeration constraint failed.

This error is caused by the field validationMode being empty.
Spent half a day trying to [...]