Alan

I got this problem.

I could only fix the problem by changing

$parsed = [];
to
$parsed = '[]';

in the “Print CSS for extraction by Critical CSS generator” in optimization.class.php

I’m not sure if this was because my setup is different, but my fix worked for me ??

I would be interested in knowing this?

Check your permalinks and .htaccess files. What you have been told us correct.

Those are the only other things that may cause this problem.

Did you read my reply.

You don’t need to delete anything. It is generated automatically because your wordpress can not find any pages or posts to display..

check your htaccess files and even your sub-domain setup in Plesk

Did you install wordpress on your new website?

What exactly did you do?

I don’t think that is how it works..

You don’t need to delete anything, just add content and it will go…

Then you made a mistake in your new template. What file did you start with?

You said it was ignoring the functions, not looking like a post. Please provide some links.

<?php
/*
Template Name: Custom1
*/
get_header(); ?>

They are just template pages, make sure it is similar to the default one.

You have probably removed the get_header(); at the top line of something..

Thats different, thats a “page template”. So call it what every you want..

The admin panel will find them..

Make a new theme… In a new folder.

That is a question for your theme designers or Google I think.

You need to edit them or better yet create your own copies of all of them..