So I was trying to authorize flickr uploader, it opened a webpage https://www.flickr.com/services/auth/ , then api key URL (https://www.flickr.com/services/auth/?api_key=XXXXXXX&perms=write&frob=XXXXX-XXXXX-XXXXX&api_sig=XXXXX), and then redirected me to flickr.com main page.
I clicked on 'complete auth' button, and this is the error I got

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Error
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System.NullReferenceException: Object reference not set to an instance of an object.
at ShareX.UploadersLib.ImageUploaders.FlickrAuthInfo..ctor(XElement element)
at ShareX.UploadersLib.ImageUploaders.FlickrUploader.GetToken(String frob)
at ShareX.UploadersLib.UploadersConfigForm.FlickrAuthComplete()
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OK
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I guess this means it's outdated, because I tried other plugins (web apps) for flickr and they worked and prompted me to approve or disapprove app access.
EDIT: I copied the .json uploader config file to the computer where auth didn't work and it's working now.
It redirecting me to home page too, also I can't even login to their web site, it keep looping login screen.
@Jaex Maybe they have changed their auth API, because my existing .json file worked (from my other computer), but when I tried to authorize from a new computer it didn't (redirected to main page).
The Flickr destination doesn't work anymore, I cannot get to work and have the same problem as described by @rudolphos!
Implemented new Flickr API now in codes. Also added direct link option.

When do you think we will get it?
Most helpful comment
Implemented new Flickr API now in codes. Also added direct link option.