This afternoon I used my Macbook Pro to Update the IPadOS developer beta for my IPad Pro 11. However, my ipad had some problems that it cannot update successfully and cannot go to the homepage. I tried to connect to Itunes and restore my IPad, but it did not work. Then, my IPad stays in the processing page. I cannot turn off or do anything else to leave the page. What can I do to save my IPad? Thank you very much if you can help me.