WriteTransaction cancellation reasons not properly handled

[Daci1]

When trying to write an item with a NaN value, the code throws the following error:

As far as I can tell, this is the problem that causes it:

• when parsing the error message object, the code expects it to have a property CancellationReasons
• the message from AWS does not include such field (as can be seen in the screenshot below)
• the consequence: it tries to map on an undefined object and throws an error (as can be seen in the screenshot above)