Wordpress 6.4.1: Fatal error: Uncaught TypeError: in_array():

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After installing Wordpress 6.4.1 the plugin gives an error:

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, string given in /membri/openfeed/wp-content/plugins/feedwordpress/feedwordpressdiagnostic.class.php:123 Stack trace: #0 /membri/openfeed/wp-content/plugins/feedwordpress/feedwordpressdiagnostic.class.php(123): in_array('update_schedule...', '') #1 /membri/openfeed/wp-content/plugins/feedwordpress/feedwordpress.php(2126): FeedWordPressDiagnostic::is_on('update_schedule...') #2 /membri/openfeed/wp-content/plugins/feedwordpress/feedwordpress.php(846): FeedWordPress::diagnostic('update_schedule...', 'Initiating an A...') #3 /membri/openfeed/wp-content/plugins/feedwordpress/feedwordpress.php(1688): FeedWordPress->update() #4 /membri/openfeed/wp-includes/class-wp-hook.php(324): FeedWordPress->auto_update('') #5 /membri/openfeed/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #6 /membri/openfeed/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #7 /membri/openfeed/wp-includes/load.php(1260): do_action('shutdown') #8 [internal function]: shutdown_action_hook() #9 {main} thrown in /membri/openfeed/wp-content/plugins/feedwordpress/feedwordpressdiagnostic.class.php on line 123

This is with even the last source in git