On https://<dogtag_ca_url>:8443/ca/ee/ca,
using profile of ‘Manual Certificate Manager Signing Certificate Enrollment’,
copy and paste CSR,
click Submit,
got failure:

     Sorry, your request is not submitted, The reason is “Missing credential: sessionID”

I used openssl command verified my csr: openssl reg -in csr.CSR -text , I am not getting any error with the command, I guess this says that my CSR is fine.