Configuring SAML with Google groups LDAP self hosted in kubernetes

Self Hosted Retool
1

I'm trying to configure google saml with ldap groups. I can log in, but the ldap part is failing

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[SAML] - Received SAML Login Response, parsing...
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[SAML] - Validating response...
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[SAML] - Validated response, and received the following attributes {
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  email: 'austin@<myemail>.com',
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  firstName: 'Austin',
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  lastName: '<my name>'
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}
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[SAML] - Warning: field groups not found in attributes
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[LDAP] - Error connecting LDAP client.  Error: self signed certificate
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    at TLSSocket.onConnectSecure (node:_tls_wrap:1530:34)
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    at TLSSocket.emit (node:events:526:28)
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    at TLSSocket.emit (node:domain:475:12)
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    at TLSSocket._finishInit (node:_tls_wrap:944:8)
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    at TLSWrap.ssl.onhandshakedone (node:_tls_wrap:725:12) {
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  code: 'DEPTH_ZERO_SELF_SIGNED_CERT'
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}

I've tried adding a self-signed certificate and adding it here:

  NODE_EXTRA_CA_CERTS: /certs/retool_selfsigned_cert.pem

but still get this error

Any guidance on how to configure google ldap to avoid this issue?