Hi every one
I have installed jellyfin and would like to run with https locally on my network, do you have any guide for this?
I have read & done this so I have my certificate which jellyfin approves on the web-interface (jellyfin.pfx) that is self-signed certificate.
https://www.sslshopper.com/article-most-common-openssl-commands.html
I still can’t access the server via https, but http works just fine.
Do you have any suggestions for this? (server has been restarted)
Yes, I know you’re going to wonder why, but it was because I want to see if it’s possible, thanks. 
restart your system and check your application log for related error messages
journalctl -u jellyfin.service
Thanks for that command, i have created the following folder /mnt/dietpi_userdata/certs/jellyfin.pfx with the cert inside.
I got the following messages:
jellyfin[651]: [21:24:29] [ERR] Error loading cert from /mnt/dietpi_userdata/certs/jellyfin.pfx
jellyfin[651]: Interop+Crypto+OpenSslCryptographicException: error:2006D002:BIO routines:BIO_new_file:system lib
jellyfin[651]: at Interop.Crypto.CheckValidOpenSslHandle(SafeHandle handle)
jellyfin[651]: at Internal.Cryptography.Pal.OpenSslX509CertificateReader.FromFile(String fileName, SafePasswordHandle password, X509KeyStorageFlags keyStorageFlags)
jellyfin[651]: at System.Security.Cryptography.X509Certificates.X509Certificate..ctor(String fileName, String password, X509KeyStorageFlags keyStorageFlags)
jellyfin[651]: at System.Security.Cryptography.X509Certificates.X509Certificate2..ctor(String fileName, String password, X509KeyStorageFlags keyStorageFlags)
jellyfin[651]: at Emby.Server.Implementations.ApplicationHost.GetCertificate(String path, String password)
Can you share following
ls -la /mnt/dietpi_userdata/certs/
yes sure here you go
drwxr-xr-x 2 root root 4096 Jul 18 21:53 .
drwxrwxr-x 8 dietpi dietpi 4096 Jul 18 21:36 ..
-rw-r--r-- 1 root root 1814 Jul 18 22:11 cert.pem
-rw------- 1 root root 4061 Jul 18 22:11 jellyfin.pfx
As you can see, certificate file is readable for user root
only. You would need to change user to jellyfin
Got it to work
sudo chmod 644 jellyfin.pfx, thanks