Cocoapods(1.11.3 ) proxy issue

[mdrauf2001]

We have created a cocoapods proxy repo in Nexus.
While testing the proxy we found that it only works with cocoapods 1.8.0 and it fails when upgrading cocoapods version to 1.11.3
Error:
Resolving dependencies of Podfile
CDN: net-cfnxj01-repository-cocoapods.org Relative path: CocoaPods-version.yml exists! Returning local because checking is only performed in repo update
CDN: net-cfnxj01-repository-cocoapods.org Relative path: all_pods_versions_a_7_5.txt exists! Returning local because checking is only performed in repo update
CDN: net-cfnxj01-repository-cocoapods.org URL couldn't be downloaded: https://nexus-******/repository/cocoapods.org/Specs/a/7/5/AFNetworking/1.1.1/AFNetworking.podspec.json Response: SSL peer certificate or SSH remote key
was not OK, retries: 4
CDN: net-cfnxj01-repository-cocoapods.org URL couldn't be downloaded: https://nexus-******/repository/cocoapods.org/Specs/a/7/5/AFNetworking/1.1.1/AFNetworking.podspec.json Response: SSL peer certificate or SSH remote key
was not OK, retries: 3
CDN: net-cfnxj01-repository-cocoapods.org URL couldn't be downloaded: https://nexus-******/repository/cocoapods.org/Specs/a/7/5/AFNetworking/1.1.1/AFNetworking.podspec.json Response: SSL peer certificate or SSH remote key
was not OK, retries: 2
CDN: net-cfnxj01-repository-cocoapods.org URL couldn't be downloaded: https://nexus-******/repository/cocoapods.org/Specs/a/7/5/AFNetworking/1.1.1/AFNetworking.podspec.json Response: SSL peer certificate or SSH remote key
was not OK, retries: 1
[!] CDN: net-cfnxj01-repository-cocoapods.org URL couldn't be downloaded: https://nexus-******/repository/cocoapods.org/Specs/a/7/5/AFNetworking/1.1.1/AFNetworking.podspec.json Response: SSL peer certificate or SSH remote key was not OK

We followed below steps:

1. Creating a gemfile with cocoapod as gem -> gem 'cocoapods', '~>1.11.3'
2. Installing the gem using command: bundle install
3. Creating a pod file with source as nexus proxy repo.
4. Installing pods using command: bundle exec pod install --verbose

Pods are installed successfully when using cocoapods v1.8.0 but getting ssl error when upgrading cocoapods version to v1.11.3.

Please find the details in podfile

_source 'https://nexus-*****/repository/cocoapods.org/'
platform :ios, "14.0"

use_frameworks!
inhibit_all_warnings!

target “hws” do
pod 'AFNetworking', '~> 2.6'
pod "ACPAnalytics", "2.2.3"
pod "ACPCore", "2.6.0"
pod "ACPUserProfile", "2.1.0"
end_