Certbot / Let's encrypt fails on OpenShift deployment

[uniqueg]

Describe the bug
OpenShift deployment of cwl-WES with helm install wes . -f values.yaml in deployment/ successfully deploys the app. However, even though the certbot container starts up, the challenge endpoint is not reachable and no certificates are obtained.

Expected behavior
The challenge endpoint should be reachable.

Additional context
The container log reads:

Inputs:
 EMAIL: cert.author@cert.author.host.org
 DOMAINS: cwlwes.c03.k8s-popup.csc.fi
 SECRET: mytls-secret
 ROUTE: cwlwes
Current Kubernetes namespce: wes
Starting HTTP server... 
Wait a little so that service will see us
Starting certbot...
Saving debug log to /tmp/log/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for cwlwes.c03.k8s-popup.csc.fi
Using the webroot path /tmp/challenge for all unmatched domains.
Waiting for verification...
IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: cwlwes.c03.k8s-popup.csc.fi
   Type:   unauthorized
   Detail: Invalid response from
   https://cwlwes.c03.k8s-popup.csc.fi/.well-known/acme-challenge/BANT3RlR7XoaP3tGq_E5Rc43D1c9McX3N36DOFz__0g 
Challenge failed for domain cwlwes.c03.k8s-popup.csc.fi
http-01 challenge for cwlwes.c03.k8s-popup.csc.fi
Cleaning up challenges
Some challenges have failed.
   [195.148.30.237]: "{\n  \"detail\": \"The requested URL was not
   found on the server. If you entered the URL manually please check
   your spelling and try"

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A/AAAA record(s) for that domain
   contain(s) the right IP address.
 - Your account credentials have been saved in your Certbot
   configuration directory at /tmp/cfg. You should make a secure
   backup of this folder now. This configuration directory will also
   contain certificates and private keys obtained by Certbot so making
   regular backups of this folder is ideal.
Certbot finished. Killing http server...
Finiding certs. Exiting if certs are not found ...
ls: /tmp/cfg/live/cwlwes.c03.k8s-popup.csc.fi: No such file or directory