Starting with Chrome version 61.0.3163.91, Google has changed their browser in such a way that uploading attachments to Ivanti Service Management produces errors or a blank error box. Development has created the attached patch for premise customers. This patch is for customers using 2016.2.1 only. Note this patch will be included OOTB with 2017.3.1 and later versions. There are patches for 2016.1.1 and 2017.x available on the Community as well.
The zip includes steps to patch your installation. Please note this will need to be applied to all web and app servers if you have multiple web/app servers in your ISM deployment.