Home.myopenhab.org device online but blank empty page

I’ve installed OP3 on a raspi3. All works fine, and till yesterday evening I was able to remotely access to my device by myopenhab.org. Now when I ltry to access the online dashboard, I see a blank page where till yestarday I saw ITEMS, THINGS, and so on… I had the same problem with a Beaglebone Black+ubuntu distribution… I saw many people facing this issue, but I didn’t understand what is the solution.
Can someone help me, please?