First of all, thank you for this tool. It really helped with getting the CSR and certificate. However, after purchase of the certificate, I get an error when I try to import the certificate to FileMaker Cloud following the instructions in your solution.
The error is:
This certificate does not match the private key [/opt/FileMaker/FileMaker Server/CStore/serverKey.pem]. Error: 20621 (Key doesn't match certificate) .
Do you have any suggestions I could try?
This error suggest that you have managed to generate a new private key for the server, after you created the CSR file for Comodo.
I would suggest that you run the process again (please download the new version of the tool first) and contact Comodo to get re-issued your certificate, using a new CSR file.