Error message during data upload through code

[alseanna]

I am getting the below mentioned error during data upload of csv file through code

Error: { type: 'Loading Error',
 message: 'Cannot open file: \'lib://af4cb-8263a-941b5-a6d2ae24d0be/call_volume_sample.csv\''

[alseanna]

how do avoid this error, is isnt allowing user to upload data