Validation error while importing products with media using excel in backoffice product cockpit

I am using Hybris v1808. I am trying to import products and their images using 'Import Excel File' feature of Backoffice Product Cockpit as per https://help.hybris.com/1808/hcd/aec3d83d840a422faf2e5904eb5e1ae2.html but I am getting a validation error. I think I am putting wrong values in the Image and Thumbnail fields. I have attached the zip file of the images and the screenshots of the excel file and the validation error.

Note: I am able to import the products without images (i.e. after removing the Image and Thumbnail columns from the excel sheet and by just uploading the excel sheet without the media zip)

[1]: /storage/temp/11483-images-25092018.zip