Is there a way to fix image upload for Facebook app verification?

I need to create one app into Facebook messenger. Developers facebook page (https://developers.facebook.com/apps/…/app-review/submissions/current-request/?business_id=…) (ids hidden of course) ask to add a photo. But photo does not upload in any way, tried several formats and images as well as several image resolutions. Using the latest browser Chrome with Windows…