external.invoke returns undefined instead of promise on Windows 10

**MY SETUP**:
Win10 Home on a virtual machine
EdgeHTML feature

**THE ISSUE**:
I'm running Win10 Home on a virtual machine and for whatever reason `window.external.invoke` always returns `undefined` rather than a Promise I can wait on (which I need for my javascript logic). But the invoke call is still making a rust api call that is working fine besides this one issue.

Unfortunately after searching through the issues it looks like I'm the only person experiencing this problem. But if anyone else is having this issue or has any advice to fix this please let me know.

Reproduce the issue on a Windows 10 virtual machine using the EdgeHTML feature and check the return value of window.external.invoke while confirming that the Rust API call still runs. Done means the invocation returns a usable Promise for JavaScript logic without breaking the existing Rust call.

Written by the indexing model from the issue text.