Moodle in English

"Lastest moodle instlalation package" – Can you tell us more precisely? You may have 3.10 (the latest release), or 3.11 or 4.0 which are both development versions.

"Xampp 3.2.4" – are you sure? The current version is 7.2.34.

Can you find out which version of PHP your Xampp has? This may show up in the php.exe's file properties in Microsoft Windows, or run php --version at the command line. I suspect it's PHP 8.0 as this has a change listed which could cause this error:

Moodle doesn't support PHP 8.0, for Moodle 3.10:

So if you do have PHP 8.0 you'll need to swtich to a Xampp version with an one of the above listed versions instead.

I can't help you with your problem.  I did give a presentation a few years back at a Moodlemoot that might help.  Not sure.  Here it is:

MoodleMoot2019 (Global and Mountain), "How to Install a “Sandbox” Moodle on Your Windows PC/Mac" 

Hi Graeme,

I was banging my head against a wall trying to figure this out too!

I downloaded Xampp and got control panel v3.2.4 as well, tried installing Moodle using the instructions https://docs.moodle.org/310/en/Windows_installation_using_XAMPP#XAMPP_using_Bitnami_to_install_Moodle

I looked a little closer at Xampp, and their latest release installs PHP 8.0.0 which Moodle doesn't run with. 
Although the control panel is v3.2.4, the installer is version 8.0.0-2.  We need to uninstall it and install an older version that Moodle is compatible with, such as 7.3.25.  You can download older versions at https://www.apachefriends.org/download.html


I've not tested this to see if it solves the issue, but I have my fingers crossed!  Hopefully Moodle will update their docs to explain this a little clearer, or run on 8.0.0 soon :') 

I too, have his issue but did not use Xampp.  My config is as follows:

• Apache 2.4.46
• PHP 8.0.5
• Moodle 3.1.0+

The exact error is Fatal error: Method lang_string::__set_state() must take exactly 1 argument in C:\Apache24\htdocs\moodle\lib\moodlelib.php on line 10692

And that line states:

public function __set_state() {
        return $this->get_string();
    }

What might I need to do?