All I know is that it said it was successfully registered. Maybe I need to install it and then retry the command, but then it says the certificate is not ready for a renewal. I also checked this website out and I think the certificate is registering to the wrong domain for some reason. SSL Checker. Maybe it is because I am using a virtual private server to connect to my domain, but I am pretty sure I connected the DNS record to the correct IP.
The way you're running certbot now will only fetch the certificate: it's nothing more than a file on your server currently. The webserver isn't automatically configured to actually use the certificate.
Why are you using the standalone plugin without an installer plugin anyway? Also, howcome you don't know the webserver you're using if your website is hosted on a private server?
Well, I am hosting my domain on https://hostinger.com and connecting my virtual private server to my sub domain hosted by https://oxide.host. How would I activate the certificate?
My hosting provider just told me to run the command as is, didn't tell me anything about a installer plugin. I know this question seems quite vague, but what do you mean by what webserver type?
The webserver running your website needs to be instructed to use your certificate. Without knowing which software is being used, it's impossible to go beyond very generic instructions as "Configure your webserver to actually use the certificate."
Also, if your hosting provider provided you the certbot command, can't they help you with the rest of the process? They must have known using only --standalone would not be enough...
I am using Apache/2.4.41 (Ubuntu) for my webserver. Also, my hosting provider never told me about any further commands to run after the one I inputted.
If you're using Apache and you're running certbot from your virtual private server, I'd recommend against using the standalone plugin (why would they advice that?!?), but use the apache plugin:
You can try to reinstall the certificate. No need to reissue a new one. Let the apache plugin do its work with the currently issued cert and hope your Apache configuration is compatible.
It's in principle not required for a HTTPS certificate, but it might not be possible for the apache plugin to update your configuration if it can't find the hostname used in your certificate.
You might try to select option 3 in your recent image, but I'm not sure if it'll work.