It's too much fiber
Now, because the dried fruits are concentrated, so is there sugar. Big amounts of sugar can lead to difficulties of digestion. The component that's problematic is sulfitis as it can lead to headaches and diarrhea. So, if you choose sulfite-free options, you should be good.
Having said all the above, breaking on these colouful teensies is better than eating fried or maida based snacks. However, there are certain things that you should keep in mind: