Required ca.crt causing error/crashloopbackoff

[proliferationofcode]

I may be confused why this is required field and causing application to crashloopbackoff.
Error: ENOENT: no such file or directory, open '/pulsar/certs/ca.crt'

I generate tls cert with cert-manager from let's encrypt. Since they are an ACME issuer the ca.crt is not sent. How can I fix this problem?
"For example, with the ACME issuer, the CA is not known and ca.crt will not exist in acme-crt-secret."
https://cert-manager.io/v1.1-docs/concepts/certificate/

This may be the wrong place to ask, but I'm trying to get this application working. Thanks