Known issue with older versions of Microsoft Edge
Microsoft Edge versions prior to 79 - 80 are unable to render the new object page in Insight 8.3.x and above.
This seems to be caused by a Javascript error (related to the Spread Operator which is only supported in the latest versions of Edge (released after Jan 15th 2020) as can be seen here: https://caniuse.com/#search=spread%20operator.
The error presents itself by saying:
SCRIPT1028: SCRIPT1028: Expected identifier, string, or number batch.js(113,121951).
To solve this issue, upgrade to the latest version of Microsoft Edge to get the browser's comparability with the Javascript code used by Insight.