Error 403 when downloading modpacks from www.feed-the-beast.com

[skyecodes]

31/08/17 09:58:49 > Curse Modpack Downloader v2.1.0-b1 by Franckyi
31/08/17 09:58:49 > Java version 1.8.0_144
31/08/17 09:59:06 > Verifying https://www.feed-the-beast.com/projects/ftb-beyond:2439679
31/08/17 09:59:06 > The file doesn't exist or website is unreachable !
java.io.IOException: Error 403 at https://www.feed-the-beast.com/projects/ftb-beyond/files/2439679/download
	at com.github.franckyi.cmpdl.task.CustomTask.getLocation(CustomTask.java:55)
	at com.github.franckyi.cmpdl.task.CustomTask.crawl(CustomTask.java:41)
	at com.github.franckyi.cmpdl.task.VerifyProjectTask.call0(VerifyProjectTask.java:51)
	at com.github.franckyi.cmpdl.task.VerifyProjectTask.call0(VerifyProjectTask.java:9)
	at com.github.franckyi.cmpdl.task.CustomTask.call(CustomTask.java:17)
	at javafx.concurrent.Task$TaskCallable.call(Task.java:1423)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.lang.Thread.run(Thread.java:748)
31/08/17 09:59:06 > The modpack is invalid !