For some reason, I cannot add attachment on zoho mail web application. A notification appeared at top of the page saying "Oops! An error occurred when attaching the file. Try again."

This happens with Microsoft Edge on both Windows 11 and macOS Sonoma.

Attachment does work with Safari under macOS Sonoma.

I have tried to clear browser data but not helpful.

Using development console, I can see:

Access to XMLHttpRequest at 'https://zmupload-accl.zoho.com/uploadTemp?mode=uploadTemp&checkOffline=false' from origin 'https://business.zoho.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

I wonder how to solve this problem.

Thanks.