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
And 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 in order to get the browser's comparability with the Javascript code used by Insight