ContextCapture Webviewer Hangs and .3mx give HTTP error 404.3

Hello all,

Just beginning to work with the ContextCapture Web Viewer to show it's potential to my supervisor, but I am having some trouble getting it to work.

Specifically I am working in IIS Express (allows for web development without admin rights) using the Command Line. The localhost I set up has the Production folder copied across from the Web Ready output (with both App and Scene folders). 

Trying to access the production, a fire hydrant, is not working when I use "localhost:[portnumber]/[ProductionFileName]/App". The page itself says "We are sorry, but there seems to be a problem with loading the scene. This might be a browser problem, so please try a different browser, such as Chrome". I have tried both Chrome and Microsoft Edge, with the same output.

On Command Line, this is the key output relating to the .3mx:

"Request started: "GET" localhost:9999/.../FH.3mx
Request ended: localhost:9999/.../FH.3mx with HTTP status 404.3"

Although the FH Scene is located within that folder. Link for those who aren't sure what the error is: https://www.webhosting.uk.com/kb/iis-http-error-404-3-not-found-add-a-mime-map/

Could it be a problem to do with access issues? Do I need to do any more work than described in this link here? https://docs.bentley.com/LiveContent/web/ContextCapture%20Help-v10/en/GUID-3F710259-3B5A-4B00-8C2A-AE41C0A43EBF.html

Thanks in advance, 

Hugh