Error 526: Invalid SSL certificate

My website worked well until yesterday.
But,it shows Error 526: Invalid SSL certificate abruptly from today.
I edit nothing.
What is the cause?

My guess would be the origin certificate expired:

I think it is wrong.Because I bought SSL last month.

You may want to review the linked article. The origin server is the server which holds your content (not Cloudflare). If you are set to use Full (Strict) the certificate installed on the server which hosts the content must meet the criteria described in that article.

This topic was automatically closed after 14 days. New replies are no longer allowed.