It just started happening today, it worked fine yesterday and I don't think anything changed on the server. I cannot edit my images, its really frustrating.
It is a security measure to prevent access from outside to the backend. The url has a specific generated number appended that acts as a kind of authentification (in simple words).
Without basci info about your install we cannot really help. Please see the "general contributors guidelines" on our user guide.
The requestor IP address must be consistent or a cross site forgery will be suspected. So if your ip address changes from request to post (Or what is presented as the ip address changes) the POST request will be considered a hacker attack.
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Without basci info about your install we cannot really help. Please see the "general contributors guidelines" on our user guide.