Google cloud ssl certificate "The SSL certificate could not be parsed"

I need help with configuring ssl certificate on google cloud. I've already obtained my ssl certificate (crt file & private key). And I've followed the link trying to create a "SSL certificate resource".

I've tried everything but the cmd below just doesn't work:

gcloud compute ssl-certificates create cert --certificate /opt/bitnami/etc/smartmeetingroom_tk.crt  --private-key /opt/bitnami/etc/serv.key

The error message I got is:Could anyone tell me what is wrong with my command (or file)?

Thanks a million!!

update:below is the screenshot of error msg when I add "--verbosity debug":I obtained ssl certificate from this website.

BTW the crt & private key is already pem encoded. Cos they are all readable using text editor and:The start&end of crt file looks like:

-----BEGIN CERTIFICATE-----

-----END CERTIFICATE-----

The start&end of private key file looks like:

-----BEGIN PRIVATE KEY-----

-----END PRIVATE KEY-----