I am not able to open a specific file after I saved it to cloud document. I double-clicked it for multiple times and there is no reaction. The same thing also happens to illustrator on iPad: while I am still able to open other cloud documents, I cannot just open that certain file. It shows "creating preview" for a second and it disappears. I tried to solve the problem by downloading the file from my cloud document but it cannot be down. It tells me there is a "downloading error". This is really an urgent question. Thank you very much!