PHP Fatal error / PHP Deprecated

Hi,

Checking my PHP error log, 2 new errors for ActivityPub:

1 – Webfinger

[20-Nov-2023 18:24:40 UTC] PHP Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-content/plugins/activitypub/includes/class-webfinger.php on line 44

2 Functions.php

[20-Nov-2023 18:24:52 UTC] PHP Fatal error: Uncaught TypeError: preg_match(): Argument #2 ($subject) must be of type string, array given in /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-content/plugins/activitypub/includes/functions.php:53
Stack trace:
#0 /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-content/plugins/activitypub/includes/functions.php(53): preg_match()
#1 /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-content/plugins/activitypub/includes/class-scheduler.php(117): Activitypub\get_remote_metadata_by_actor()
#2 /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-includes/class-wp-hook.php(324): Activitypub\Scheduler::update_followers()
#3 /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#4 /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-includes/plugin.php(565): WP_Hook->do_action()
#5 /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-cron.php(191): do_action_ref_array()
#6 {main} thrown in /srv/data/web/vhosts/www.didiermary.fr/htdocs/wp-content/plugins/activitypub/includes/functions.php on line 53

Sincerely
DJM