First one says: Web Server’s Default Page | This page is generated by Plesk, the leading hosting automation software. | You see this page because there is no Web site at this address. | Log in to Plesk to create websites and set up hosting | New to Plesk? | Learn how to log in and start working with it. ||| And second one says: ERR_TOO_MANY_REDIRECTS
Ensure that the encryption mode is set to “Full (Strict)” for pageoptimizer.fi on the Cloudflare Dashboard.
The most recent IP address I can see for your web server ends with 85.18. That address seems to be correct (it has a valid cert for your domain, and has a WordPress site working). Can you verify that the correct IP address is configured on the helsinginkauppahuone.fi DNS? That domain should also be configured for Full (Strict).