Hi, this refers to the Browser tab underneath Protocol Data view.
Technically this is not an error but more informational.
Javascript is not executed at playback of a test in RPT because running javascript is something a browser can do, and at playback RPT doesn't use a browser to play back the test, it sends recorded HTTP requests under the covers.
In fact a test RPT is really a java program with no UI.
So for the browser tab RPT will render the page the best it can which means using static elements, but nowadays a live webpage will be rendered by executing javascript or other code.
When such code is executed in a browser it usually puts no load on the web application server itself, this is a client side activity.
If the javascript does make a call to the web application server the this would be done by a HTTP Get or Post request. This Get or Post is recorded and played back by RPT like any other recorded request
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