Oh, ok, I get it - you’re trying to use a program called “PostyBirb” to upload images to Derpibooru, but it’s not working. I see now. Now the title of this thread actually makes sense.
Unfortunately, we really don’t provide support for third party applications - they’re completely allowed, but we have no idea how those apps work, how to troubleshoot them, etc. You probably would be better off asking PostyBirb’s devs about your issue, as they’re going to know way more about their application than we ever would.
Now if there’s a problem within the application itself, like it’s having issues with our API or whatever, the devs can reach out to us and we’ll usually be happy to work with them and try to figure things out. But for end user support, that’s up to them.