TypeError Argument 8 of StorageEvent.initStorageEvent does not implement interface Storage

Environment

Product Version	prior to 9.1.15.702
Product	Progress® Telerik® Reporting

Description

Error Message

TypeError: Argument 8 of StorageEvent.initStorageEvent does not implement interface Storage

or

TypeError: Failed to execute 'initStorageEvent' on 'StorageEvent': parameter 8 is not of type 'Storage'

Solution

This is a known issue fixed in internal build v9.1.15.702. It can be downloaded after logging into your Telerik account. Once you log in, you should go to the Downloads page, locate Progress Telerik Reporting product and when you click on it, a download page should appear, showing the last main build and the latest internal build. 

After installing you will have to run the Upgrade Wizard.