As posted on Within Temptation's website:

Dear fans from Israel,

Unfortunately, we have to cancel our show on October 12th in Tel Aviv, Israel. We are all set and ready to do the show, but the promoter has failed to take care of the necessary means, such as booking flights and actually booking the venue. Also, as you may have noticed, tickets had not gone on sale either. Rescheduling hasn't worked out either because there weren't any dates available for both us and the venue. We are very sorry to have to cancel the show, but this is beyond our control. We hope to see you on our next tour!

All the best,

WT.