I have not tried it myself but did your terminal quote suggests that you created a folder config inside the folder homeassistant.
If so, then in your condiguration.yaml you would need ...\config\config\..., would you not?
If you use VSC Code or HA terminal or something, maybe connect to the server and see if the files are actually where you think they are.
If that is not the issue, then with deprecated base_url, do you maybe need to define internal and external url? But that is just a complete stab in the dark.
I used the OpenSSL instruction inside the /config folder inside /homeassistant, so fullchain.pem and privkey.pem would already be inside the /config folder.
Another thread suggested the /config/config input. I tried it but to no avail.
My problem is that I have been getting the recovery mode issue because I kept on typing my ip with https without logging out of Home Assistant, so the browser doesn’t recognise the certificate yet. What a basic negligence on my part!
Anyway, that’s the problem with working so late early in the morning…
Thanks for reminding @tmjpugh and the browser update, requiring me to restart it. Without your reply and the update, I wouldn’t have tried the entry again. I guess my brain that time was the one that was on limp/safe/recovery mode. Cheers