I have tried all the ways to open it but I can not manage also can not download at all
Sorry to hear about this trouble. I am hopful that the issue is resolved by now. If not, I would request if you could share the document with us.
Go to https://assets.adobe.com/cloud-documents, click on the three dots next to your file and click Get link.
I having same issue, cant open the ai file from cloud. before 1 hour i still can open it, after restart my pc, i cant open anymore. all cloud files cant open.
This issue is fixed in AI 25.1 update available in Creative Cloud Desktop
Hi, My AI version is 25.3.1 the latest one, still having this issue.