Thanks for your reply, I want to be sure of a point : Do you have access to your web app through your virtual machine ? I am saying this assumption because when the API is not exposed to a dedicated DNS or simply when the virtual machine cannot reach the API : missing internet connexion for example, it will crash.
Can you try to open edge and point to your trusted domain and see if you reach it.
In case of not you can edit the hosts file : Modify your hosts file and match the IP from the web app and the trusted domain