Unable to install Elastic-search on SLES12 SP5 linux server

Hi,
I am trying to install Elastic search service on SLES12 SP5 server using zypper. I am following this link to create repo and run the 'zypper' cmd to install the elasticsearch service. But the installation fails as its not able to find the url. Even I had proxy values, still it didnt work.

elasticsearch.repo
[elasticsearch]
name=Elasticsearch repository for 8.x packages
baseurl=https://artifacts.elastic.co/packages/8.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=0
autorefresh=1
type=rpm-md

zypper refresh
Repository 'SLES12-SP5-Pool' is up to date.
Repository 'SLES12-SP5-Updates' is up to date.
Retrieving repository 'Elasticsearch repository for 8.x packages' metadata ----------------------------------------------------------------------------------------------------------

New repository or package signing key received:

Repository: Elasticsearch repository for 8.x packages
Key Name: Elasticsearch (Elasticsearch Signing Key) dev_ops@elasticsearch.org
Key Fingerprint: 46095ACC 8548582C 1A2699A9 D27D666C D88E42B4
Key Created: Tue 05 Sep 2023 02:54:33 AM PDT
Key Expires: (does not expire)
Subkey: AB6B7FCB60D31954 2013-09-16 [does not expire]
Rpm Name: gpg-pubkey-d88e42b4-64f6fad9

Do you want to reject the key, trust temporarily, or trust always? [r/t/a/? shows all options] (r): r
Retrieving repository 'Elasticsearch repository for 8.x packages' metadata ......................................................................................................[error]
Repository 'Elasticsearch repository for 8.x packages' is invalid.
[elasticsearch|https://artifacts.elastic.co/packages/8.x/yum] Valid metadata not found at specified URL
Please check if the URIs defined for this repository are pointing to a valid repository.
Skipping repository 'Elasticsearch repository for 8.x packages' because of the above error.
Repository 'prod-xxxx-ec-sle-live-patching12-sp5-pool-x86_64-hpc' is up to date.
Repository 'prod-xxxx-ec-sle-module-hpc12-pool-x86_64-hpc-sp5' is up to date.
Repository 'prod-xxxx-ec-sle-module-legacy12-pool-x86_64-hpc-sp5' is up to date.
Repository 'prod-xxxx-ec-sle-module-toolchain12-pool-x86_64-hpc-sp5' is up to date.
Repository 'prod-xxxx-ec-sle-module-web-scripting12-pool-x86_64-hpc-sp5' is up to date.
Repository 'prod-xxxx-ec-sle-sdk12-sp5-pool-x86_64-hpc' is up to date.
Repository 'prod-xxxx-ec-sles12-sp5-kde-x86_64-hpc' is up to date.
Repository 'prod-xxxx-ec-sles12-sp5-pool-x86_64-hpc' is up to date.
Repository 'prod-xxxx-ec-sles12-sp5-thirdparty-x86_64-hpc' is up to date.
Some of the repositories have not been refreshed because of an error.