Hi Tonghui,
I hope all is well. No worries, but it looks like the issue is happening again, at least with Google Chrome. Users from my Org reported that they could not export CSV files from a WebApp Builder app embedded within Experience Builder. As a temporary solution, I was planning on using the embed widget in ArcGIS Dashboard, but it looks like the issue is also happening there. However, everything works perfectly fine in Firefox, but my users prefer to use Google Chrome when accessing our web apps.
Could you please look into this and let me know if this is the same issue as before?
Thank you so much for your help!
Carlos