HTTP ERROR 500 when running fpa-en.php

[clafil]

I downloaded ForumPostAssistant-FPA-v1.6.6-0-g997cd65.zipper from viewtopic.php?f=621&t=582860 and uploaded fpa-en.php to my Joomla 4 site root, but when I run it the HTTP ERROR 500 page immediately comes out.
Linux server with PHP 8.3
These are the first lines of the log:
29/02/2024 00:19:17 WARNING: [pool www.movimentofederalistaeuropeo.it] child 734 said into stderr: "[29-Feb-2024 00:19:17 Europe/Rome] PHP Fatal error: Uncaught TypeError: fseek(): Argument #1 ($stream) must be of type resource, false given in /web/htdocs/www.movimentofederalistaeuropeo.it/home ... en.php:947"
29/02/2024 00:19:17 WARNING: [pool www.movimentofederalistaeuropeo.it] child 734 said into stderr: "Stack trace:"
29/02/2024 00:19:17 WARNING: [pool www.movimentofederalistaeuropeo.it] child 734 said into stderr: "#0 /web/htdocs/www.movimentofederalistaeuropeo.it/home ... n.php(947): fseek()"
29/02/2024 00:19:17 WARNING: [pool www.movimentofederalistaeuropeo.it] child 734 said into stderr: "#1 {main}"
29/02/2024 00:19:17 WARNING: [pool www.movimentofederalistaeuropeo.it] child 734 said into stderr: " thrown in /web/htdocs/www.movimentofederalistaeuropeo.it/home/port/fpa-en.php on line 947"

[toivo]

I just tested FPA v1.6.6 using PHP 8.3.2 and it worked all right in a localhost Wampserver test site.

PHP Fatal error: Uncaught TypeError: fseek(): Argument #1 ($stream) must be of type resource, false given in /web/htdocs/www.movimentofederalistaeuropeo.it/home ... en.php:947"

This error occurs, if the FPA script is unable to open the PHP error log.

Check the location of the PHP error log from System - Information - System Information - PHP Information. Search for error_log on the page and make a note of the contents of error_log and error_log_mode, which should be 0644.

Contact the support team of your host to find out why the PHP error log could not be accessed.