Apache Httpd sending 'HTTP/1.1 426 Upgrade Required' Response Header causing Request Failure

Issue

• While accessing the application and its APIs, Apache Httpd is sending an HTTP/1.1 426 Upgrade Required Response Header causing failure.
• Getting below output while using the curl to access the application API.

< HTTP/1.1 426 Upgrade Required
HTTP/1.1 426 Upgrade Required
< Date: Thu, 25 Jul 2024 06:23:42 GMT
Date: Thu, 25 Jul 2024 06:23:42 GMT
< Server: Apache/2.4.37 (Red Hat Enterprise Linux) OpenSSL/1.1.1k
Server: Apache/2.4.37 (Red Hat Enterprise Linux) OpenSSL/1.1.1k

• Apache Httpd is configured as a Reverse Proxy for my application deployed on Openshift and uses Service Mesh (Istio Envoy) which requires HTTP/1.1 or HTTP/2.