I am working on the process of using the CoralNet API so that you can obtain sparse labels for an image using an already trained classifier (i.e. source). where we first submit a request to CoralNet using their API instructing which source we want to use, the image(s) we're trying to annotate, and the location we want the sparse labels to be (that's right, we get to specify). After submitting the request, we wait and periodically check back to see the progress. Once the request has been completed, we're sent back the annotations, which are then converted into a .csv file.
But Next we'll create a list of all of the images that are currently in the dropbox 'project_folder'. You can see below that we create a list called file_list and in it we store just a single image, which includes all of the metadata from dropbox. Note that you can increase the number of images you want to be annotated by the source by changing the num_images variable

But i get an error:

How to resolve this error please your cooperation will be highly appreciated