Ever made a mistake?!

It happens.

Say, you input the control source of a Modern Web Browser Control (MWBC) as a local html file, but you make a mistake in the path or file name, so in fact the specified path/filename doesn’t exist.

Ordinarily, in Edge, you get a nice screen that clearly indicates:

File not found
It may have been moved, editied, or deleted.
ERR_FILE_NOT_FOUND

Furthermore, if you open the inspection tools and switch over to the console you’ll see a clear message:

Not allowed to load resource:
file://YourFileName

The problem being that in the MWBC, we get none of that!

No indication of any type that the specified file does not exist!

All you get is a blank control with the default html source:

with no message and nothing in the console either to indicate any issue!

So why the difference in behavior at the Web Browser level?
Why would Access itself not report the error that the file cannot be found/loaded?

Just one more to add to the MWBC bug list!