Foreword:
I found that my website cannot be accessed using https. It turns out that there is no SSL certificate deployed for the website.
Through this article, you can deploy an SSL certificate (Let's Encrypt) for free with one click.
text:
1. As shown in the figure, the website does not have an SSL certificate deployed:
2. Click "Not Deployed"-select "Let's Encrypt"-select "DNS Verification"
Here I chose "Automatically combine generic domain names", but the first application failed;
Then choose not to check "Automatically combine pan-domain names" and the application is successful.
3.Applying now:
4. Application successful:
At this point, you have applied for a 90-day SSL certificate for your domain name.
5. Verify SSL:
