Enforce UI hangs when selecting a detection server in Servers and Detectors Overview.

Products

• Data Loss Prevention Network Monitor and Prevent for Email
• Data Loss Prevention

Issue/Introduction

When going to System> servers and detectors > server overview and then editing an existing detection server. The page hangs and in the tomcat logs we see the following:

Thread: 128
Level: SEVERE
Source: com.vontu.manager.ui.LogToServerController
Message: loggedInUser:[TestUser1], url:[/ProtectManager/SystemOverview.do], browserInformation:[Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; wbxvdi 1.0.0; rv:11.0) like Gecko], browserLocale:[en-US], userLocale:[en_US]
Javascript error at line 305: Object doesn't support property or method 'includes.'

This issue will also occur when clicking into the incidents overview. 

Environment

DLP 16.x

Rhel 8.x

Windows 10 or 11 client running edge browser

Cause

IE compatibility mode is enabled for the Enforce UI domain or enabled for all domains.

Resolution

disable IE compatability mode for edge when accessing the Enforce UI.