If your application has no Common Looking Field pages it will show only very basic HTML structure. To fix the issue you can start here:
Read article How to Fix NORMS When It Displays Nothing When Running Locally
Read RDIMS #8252648. However, it is outdated at the moment (Jun-22-2022)
It is assumed that everything is installed in the proper order:
Visual Studio with IIS Express
StreamTagfilter 1.0.6.2 - version is important in the steps below!
CLFPagePlugin
CLFPagePlugin Templates in C:\Program Files (x86)\Transport Canada\CLFPagePlugin\Templates
Try to run application first time and get HTML only page. This will initiate IIS Express settings. There are 2 ways of setting the application CLF. It is fully related to IIS Express version. If you installed only VS2019 or below consider 1st way. If you installed VS2022 consider the second. However, keep in mind that if you somehow installed the very latest version of IIS Express then consider the second option. But it is fully ok to try #1 first and if it failed, try #2