This issue occurs to the following Excel reports:
Symptom of this issue can be seen if you click on one of the above reports, the following dialog shows up:
And you cannot close this dialog by clicking [X] or [Cancel] button.
This has been confirmed as a defect and will be reviewed for a future release of the product.
Applies to: RC 3.8; IE 10 and 11
Fixed in: RC 3.8 SR1
Reference: TFS #14274
Knowledge base ID: 0155
Last updated: Feb 23, 2016