I'm sure that there's a simple answer to this, but I'm still pretty new to the Cameo simulation tools and it's got me stumped: I'm trying to practice using the UI Widgets Library for Cameo Systems Modeler (2021x), and I'm able to run the WebUIWidgets.mdzip without any issues, but when I try to run my own UI widget model (ibd shown below), I run into an HTTPS 404 error. 

In the NoMagic documentation, they recommend the Generate HTML command to solve the error, but I've tried to delete and regenerate the html and still get the same issue.

As far as I can tell, all the simulation config settings are identical between the WebUIWidgets file and my own, so any ideas what could be causing the issue/what my next troubleshooting steps should be?