This is also described here in the Japanese area: Filemaker Server17でのCSR再作成について
I know this is the case with comodo certificates, but maybe not others. I stopped using FMS to generate CSRs in FMS15 because of the problems. Using a Linux server is my go to tool for this now. Specifically the WHM CSR utility. How are people using the CLI in FMS17 to specify the country code that is required for comodo certs?
Product issue? FMS17 cannot generate CSRs for the officially supported certs?