My Imgur upload function does not work without any reason.

Hey Internet, I'm trying to upload a CanvasSnapshot to Imgur because they accept base64 data.

This is the error.

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{"data":{"error":"Image format not supported, or image is corrupt.","request":"\/3\/image","method":"POST"},"success":false,"status":400}

Following their examples and reading the API, I tried every single setup for the AJAX call.

Can you help me out?

My client ID is showing in the .capx, don't mind it; I will delete it anyway when this gets resolved.
Get yourself a client ID.

The same exact code works in jQuery, I don't know what seems to be the issue.

I'm dying.

Set the POST data to:

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"type='base64'&image=" & URLEncode(RegexReplace(CanvasSnapshot, "data:image/png;base64,", "", ""))

@ramones Thank you very much, I still don't understand why that syntax works and mine didn't... but that's how life goes, I guess,

The query string format for GET/POST requests is key-value pairs like key=value, separated by &, with + replacing any spaces.
parameter1=value1&parameter2=value2&parameter3=value+number+3

It looks like you were trying to use jQuery syntax. In jQuery you can pass an object { parameter1: value1, parameter2: value2 } which jQuery will convert into a query string like above.

And then the base64 encoded image could contain & or + or other characters that could be confused as part of the query string so you need to wrap it in URLEncode().