Unable to edit space permissions using Chrome

Using the Chrome browser (v43), when attempting to modify space permissions in Confluence Cloud, we are unable to add users or groups. Upon selecting the user or group and clicking "Add", the button simply grays out and nothing happens.

This problem does not occur in Firefox or IE11, however, our company uses Chrome only and this is a blocker for us as we need to provide access to several users on a regular basis for multiple projects. Please advise on how to resolve this.