Android Trust Anchor For Certification Path Not Found. My Backend Have Not Self Assigned Certificate. What To Do?

My backend server can be accessed only by https. The certificate was bought/configured from a certificate authority (CA). When I am trying to access my API through retrofit, I am g

Solution 1:

Problem was that on backend Intermediate certificate was not. So this problem has been solved. Here is more info https://github.com/kubernetes/ingress-nginx/issues/6398