python 3.x – Connect http API to https domain on AWS – Stack Overflow

I have a Web App with registered domain and it is running on AWS EC2. The domain is https:\\abc.abc. I have a flask API on the same instance where it running as a microservice. The API is running as http:\\abc.abc. Now when I try to connect to the API using the Web App with the registered domain it shows me
ERR_SSL_PROTOCOL_ERROR.
I have an idea that this is error is because of the
https and http connection
but I don’t know how to solve it. Can someone please help?

In need for a somewhat detailed answer as this error is completely new for me.