Self signed CA signing a self signed certificate causes a ERR_SSL_SERVER_CERT_BAD_FORMAT

[Arlisaha]

Hi. First of all, thank you for this package it's really great.
This is surely most me missing something than an issue but, here it is. I'm generating a self signed CA (with basicConstraints cA flag to true, issuer as itself and signed with its own private key) that I convert to PEM and write it down to a file before storing it into CA windows store with certmgr. Then, I create another certificate with my previous CA's subject attributes as issuer and sign it with my CA's private key. I convert it to PEM and write it down to a file, do the same with the private key, but when I use them with a server app (apache, npm serve) chrome (and other browsers) give me a ERR_SSL_SERVER_CERT_BAD_FORMAT. And as soon as I remove the line that set issuer's attributes, browsers consider certificate as a risk but I can reach my served files.
I did the same logic with openssl and it worked.
What am I missing ?