I would like to create a panel to use on my Xbox - that uses a version of edge - but at the login page I cannot trigger the "log in" button.
Without browser debugging output, it's going to be difficult to tell what's going on. In Windows Edge (as well as Chrome and Firefox), pressing F12 will bring up the debugger; and all error messages are shown in the "console" tab of the debugger.
If F12 is not available, right-click / "Inspect Element" will also trigger the debugger panes to appear.
I don't know if these options are available on XBox. If not, then an XBox developer environment is likely required - i.e., I presume there's a development environment for Windows for XBox games and tools; but I don't have expertise in this regard.
Customer support service by UserEcho