(Solved) Unable to import Let's Encrypt certificate

[uikhjk]

Hello
I have problems to import an existing Let's Encrypt certificate. I created it using my CentOS system and I have a PEM with the full chain and one containing the private key. I could import those two files in the OPNsense firewall that was delivered two weeks ago. But yesterday I had to reset my firewall to factory defaults (I missconfigured something and wasn't able to connect to any site anymore).
Now my system runs OPNsense 24.7_9_amd64 and I'm not able to import my Let's Encrypt certificate successfully. The error message just says: missing CA key
Has anybody an idea how I get this certificate working on my OPNsense?

[MoonbeamFrame]

Try using the fullchain.pem instead of the cert.pem

[uikhjk]

Hi MoonbeamFrame
Sorry for my late response but I was on vacation the last few weeks ;-) Thank you for your reply. But I used the fullchain.pem when I received the error.
But meanwhile the problem seems to be solved :-) I just was able to import the certificate and to enable it. My server runs now:
OPNsense 24.7.1-amd64
FreeBSD 14.1-RELEASE-p3
OpenSSL 3.0.14