Moodle 4.5: incompatible declaration of Katzgrau\KLogger\Logger::log causes JS Error on assign submission grading page

[llttugraz]

Steps to reproduce

having "Display debug messages" activated and the "Debug messages" set to DEVELOPER:

1. add an assign activity (in our setup Turnitin was even not enabled)
2. submit a pdf as a student
3. open the assign activity as a teacher or manager
4. click on Grade button
5. The pdf is opened for annotation but a dialog is poped up as follows:

Looking in to XHR requests on this page, you find a request to r.php/api/rest/v2/user/current/preferences with the request parameter {"preferences":{"assign_filter":""}} with the following response:

<br/>
<b>Fatal error</b>
:  Declaration of Katzgrau\KLogger\Logger::log($level, $message, array $context = []) must be compatible with Psr\Log\AbstractLogger::log($level, Stringable|string $message, array $context = []): void in 
<b>/home/mdl/src/moodle/plagiarism/turnitinsim/vendor/katzgrau/klogger/src/Logger.php</b>
 on line 
<b>209</b>
<br/>

Reason

Moodle 4.5 provides the very last version of Psr\Log 3.x (to be found under lib/psr/). In this version, the signature is different:

abstract public function log($level, string|\Stringable $message, array $context = []): void;

Apparently the Psr\Log provided in Moodle is considered in Katzgrau\KLogger\Logger