Block IP/Country Custom Page

I placed a simple html text like below and upload the page onto my server. I placed it in the Block IP/Country custom page, and when I preview it, it says:

Custom error preview failed

Status code 500 received while fetching template from …

5XX Level Errors page

5XX Level Errors

::CLOUDFLARE_ERROR_500S_BOX::

Also when I click on publish it says:

“Your custom page must be larger than 100 characters (Code: 1203)”

Its more than 100 characters including : // also.

I am afraid the error says it all regarding the characther length.

Be sure to check your HTML code with https://validator.w3.org/ too.

I believe you would need to have HTML and CSS code written and not using it as external resource, if so.

Give yourself a freedom. Be creative about it :wink:

I’ve seen others get this same message when clearly there were more than 100 characters.

https://community.cloudflare.com/search?q=1203