IFS CLOUD - Unable to upload certificate into the MW

Hi All

I want to add certificate to ifsapp-iam pod from our ADFS server. It isn't public certificate.
I follow the documentation but without success:

https://docs.ifs.com/techdocs/23r1/070_remote_deploy/010_installing_fresh_system/200_installing_ifs_cloud/035_ifs_cloud_ifsinstaller/030_installation_parameters/#specific_certificate_for_pods

I tried both options with "mycertfromfile" and "mycertintext" but it fails. I have still error message in ifsapp-iam logs:
2023-09-19 17:22:42,991 ERROR [org.keycloak.broker.oidc.AbstractOAuth2IdentityProvider] (executor-thread-5) Failed to make identity provider oauth callback: javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Additionally at the top of log file I have message:
Using API to fetch certificates
/opt/ifs/get_certs.sh: line 50: $(sed -e 's/^"//' -e 's/"$//' <<< "$(echo -e "${split[0]}" | tr -d '[:space:]')"): ambiguous redirect
No certificates are loaded for ifsapp-iam-certs ..
Setting up the secrets

Do You have any idea how to import cert? Why get_certs.sh script fails? It is 22R2U6