Well... i have a problem. I can not upload any images to the image gallery in K2/items.

Up to yesterday i was uploading images to image gallery as a single image or as a zip file but yesterday i tried to upload my gallery via flickr. I have lots of images to upload so i thought it would go much easier. Flickr upload appeared to be somehow unsuccessful, so i deleted my flickr set url, api key and tried to upload a single image.

Somehow my attempts to upload images via flickr caused an error. Any time i want upload a single image there is an error:

"An error has occurred.
0 Unknown Archive Type
Return to Control Panel [button]" - anyone knows how to solve it? i would be very grateful