It sounds like you're trying to save a file, presumably an image file, but based on the truncated URL you shared here, the URL you're using is actually to a Google Images HTML page, not to the image itself.
Accordingly, the save operation is failing. If you're trying to save an image file, get and use the actual URL to the image itself.
Thank you for the quick help! It really was my mistake and now everything works. But I have another problem - I get "download failed" when I try to load a big file(about 200 Mb). Are there some limits on the size of a file that I want to load?