Installing an SSL certificate is one of the most effective ways to fix the Can’t Provide a Secure Connection error message if you are the website owner. Depending on the web hosting provider, configuring the additional security layer may vary.
At Hostinger, you can install an SSL certificate on hPanel:
Go to the SSL section and click the Install free SSL button.
The SSL certificates menu on hPanel, highlighting the Install free SSL button
Choose a domain and select Install SSL.
The Install SSL Certificate pop-up with the Install SSL button highlighted
Once the website address shows a green check mark and Active status, the SSL is successfully installed. If not, make sure the domain is pointing to Hostinger nameservers.
This method should solve the Can’t Provide a Secure Connection issue on your website.