jQuery : Failed to construct 'Blob': The 1st argument provided is either null, or an invalid Array o

jQuery : Failed to construct 'Blob': The 1st argument provided is either null, or an invalid Array object.
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jQuery : Failed to construct 'Blob': The 1st argument provided is either null, or an invalid Array object.
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Array Failed or jQuery 1st The either object. 'Blob': null, to argument provided an invalid is construct :