I've been on Scratch for more then a year, but I still don't get the message that pops up sometimes when one of my projects fail to upload. It says in red: Failed to upload: Unknown reason (maybe not the exact words). What are the unknown reasons? I've compressed my sounds to low and my images to 50, but it still says that.
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When you're uploading, there's a box that says "Compress Sounds and Images" next to it. Try unchecking it when uploading your project.
I hope that this helps!
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