Error executing paths_cleanup

Hello all,

I started using filerun, latest version with PHP 7.3 with no problems at all but when I tried to execute "paths_cleanup.php" from command line I'm getting the following error:

php -c /etc/php/7.3/apache2/php.ini ./paths_cleanup.php
-------------------- START ----------------------
PHP Fatal error: Uncaught Error: Call to a member function fetch() on null in /var/www/html/filerun/system/modules/search/sections/cli/php/paths_cleanup.php:6
Stack trace:
#0 /var/www/html/filerun/index.php(191): unknown()
#1 /var/www/html/filerun/cron/paths_cleanup.php(8): unknown()
#2 {main}
thrown in /var/www/html/filerun/system/modules/search/sections/cli/php/paths_cleanup.php on line 6

I've no clue of the cause of the error nor where to look, php error log shows the same. Can anybody give a hint?

Thanks in advance

Kind regards