There is an error whenever you cancel market goods.
This does not happen if you cancel 15 items on a single page or less.
Is it possible to make the default limit set to that?
Wrong thread buddy, this isn't the GCA thread.
However I know what you mean and I can answer - this is purely server related, the server is overloaded or simply cannot handle all the requests in a short time, from GCA side, I can't promise anything. This would be better, if it was addressed from Gameforge, or it's on purpose, a requests limit so the server does not crash - unsure currently.