Kirby\Cms\App::extendHooks(): Argument #1 ($hooks) must be of type array, bool given, called in /project/kirby/src/Cms/AppPlugins.php on line 107

[ScreenRes]

I’m having the same issue.
Saving a form in the Panel works fine apart from the blog/news section, I get the same error:

Kirby\Cms\App::extendHooks(): Argument #1 ($hooks) must be of type array, bool given, called in /public_html/kirby/src/Cms/AppPlugins.php on line 108

To get around this I use a fix suggested by @pixelijn in this post:

Error when using require within config.php

I am getting the weirdest of errors and can’t figure it out. When changing page status in the Panel from draft to listed, I receive the error: Argument 1 passed to Kirby\Cms\App::extendHooks() must be of the type array, boolean given, called in /home/sg/myproject/kirby/src/Cms/AppPlugins.php on line 102 Issue occurs both in production and on my local Valet Linux system. Now, after quite some detective work (and with pointers from a recent issue), I narrowed it down to the routes/hooks setup i…

I followed the method for using multiple config files in the Kirby Guide:

Configuration

What is the best method for using multiple files?
require_once 'path-to-file.php'
or
require __DIR__.'/path-to-file.php'

My current LIVE/Production setup is:
Kirby 3.8.0
PHP 8.0.28