You are using a context path, did you follow step 6 of the installation guide?
Step 6: (Optional) Updating .html files
If the LCA Collaboration Server is not running in the server’s root context, modify all .html files in the WEB-INF/classes/static directory. Adjust the base tag to match the context path. For example, if it runs at domain.com/subcontext, update the value to <base href=”/subcontext/”/>