Plesk website fails to load when Cloudflare is used

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Let’s take a look at how our Support Team help a customer  deal with this Plesk error.

How to resolve plesk website fails to load when Cloudflare is used?

Usually, issue occurs if the SSL setting is set as “Flexible” in Cloudflare Crypto settings for this domain.

Typical error looks as shown below:



The page isn’t redirecting properly

When Cloudflare is disable, the website loads fine.

The Permanent SEO-safe 301 redirect from HTTP to HTTPS setting is enabled in Plesk at Domains > > Hosting Settings or custom HTTPS redirection is configured in domain’s .htaccess file.

Trying to issue a Let’s Encrypt certificate for the domain fails with the following error:

Invalid response from
Type: urn:ietf:params:acme:error:connection
Status: 400
Detail: Fetching /.well-known/acme-challenge/UcTI6ov0Pc3Fn2IRnNUiFKZKzBu5NaAy4IoscLbYh_I: Redirect loop detected

Today, let us see the simple step followed by our Support Techs to resolve it.

Log in to your Cloudflare account > click on the domain > click Crypto and change the SSL setting to “Full (strict)”.

Please note the CloudFlare account is created automatically during the initial activation of the extension.

Since the CloudFlare extension is enabled on the server, the corresponding account on a CloudFlare side already exists.

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Today, we saw steps followed by our Support Engineers to resolve plesk website fails to load.


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