When clicking on the Asset Viewer button from the CI detail screen, it attempts to launch an incorrect non-SSL URL, which results in a 404 error if SSL is being enforced in the environment.
This may be caused by an incorrect value set for the @NX_SERVLET_SERVER_URL variable in the nx.env file.
Open the nx.env file and update the @NX_SERVLET_SERVER_URL as follows:
Next, recycle CA Service Desk Manager services, and test launching the Asset Manager from a CI again.
It should now point to the proper URL and load correctly.