"Error, missing Report Suite ID in AppMeasurement initialization" is displayed in Browser Console

Adobe Analytics Implementation Help > Implementation Overview > JavaScript implementation overview > About AppMeasurement for JavaScript

Adobe Analytics is implemented on the website via DTM and use of Custom Code. 
When looking at the Developer Console in the browser, I can see the error: Error, missing Report Suite ID in AppMeasurement initialization.
In some instances, the image request can still be fired correctly.

• Adobe Analytics
• DTM

Using s = new AppMeasurement() to instantiate the s object causes this issue.

Do not use the "new AppMeasurement" instantiation method. We recommend using s_gi instead.

var s_account="INSERT-RSID-HERE"
var s=s_gi(s_account)