Can you extend an-expired certificate without command access

Feature Requests
1

Hello
I’m the founder of a startup skyclear.org, the development of my application was outsourced to a company who is no more maintaining my app because of pending payments.

I cannot access anymore my application because the certificate of security is expired, is it possible to renew it from my side

I’m the owner of the Skyclear domain, the app , copyright and trademark

Coud you please assist me in extending the validity of this certificate

Thank you

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: staging.skyclear.protal.biz

I ran this command: URL input

It produced this output: ERR CERT DATE INVALID

My web server is (include version): Chrome

The operating system my web server runs on is (include version): IOS

My hosting provider, if applicable, is: AWS

I can login to a root shell on my machine (yes or no, or I don’t know): YES

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):no

2

You already have another ticket - related to this same domain.
But to answer your question:
NO
Certificates have a start and end date.
They can’t be “modified” in any way.

3

Are you a domain owner? E.g. can you modify DNS records?

4

Hello. I'm going to close this topic so the conversation doesn't get duplicated with the other one.