WordPress generates PublishFuture error message

WordPress on my sends me emails with thies message. The Future plugin appears to be involved. What should I do?
Thanks!
Frans van Ittersum

Foutdetails
===========
Een fout van het type E_ERROR werd veroorzaakt op regelnummer 54 van het bestand /home/willibror/domains/willibrordusorgel.nl/public_html/wp-content/plugins/post-expirator/src/Core/Autoloader.php. Fout bericht: Uncaught Error: Failed opening required '/home/willibror/domains/willibrordusorgel.nl/public_html/wp-content/plugins/post-expirator/src/Core/../Core/DI/ContainerInterface.php' (include_path='.:/opt/alt/php81/usr/share/pear:/opt/alt/php81/usr/share/php:/usr/share/pear:/usr/share/php') in /home/willibror/domains/willibrordusorgel.nl/public_html/wp-content/plugins/post-expirator/src/Core/Autoloader.php:54
Stack trace:
#0 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-content/plugins/post-expirator/src/Core/DI/Container.php(20): PublishPress\Future\Core\Autoloader::autoload('PublishPress\\Fu...')
#1 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-content/plugins/post-expirator/src/Core/Autoloader.php(54): require('/home/willibror...')
#2 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-content/plugins/post-expirator/post-expirator.php(109): PublishPress\Future\Core\Autoloader::autoload('PublishPress\\Fu...')
#3 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-content/plugins/post-expirator/post-expirator.php(127): PublishPress\Future\loadDependencies()
#4 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-includes/class-wp-hook.php(322): PublishPress\Future\{closure}()
#5 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#6 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#7 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-settings.php(700): do_action('init')
#8 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-config.php(87): require_once('/home/willibror...')
#9 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-load.php(50): require_once('/home/willibror...')
#10 /home/willibror/domains/willibrordusorgel.nl/public_html/wp-login.php(12): require('/home/willibror...')
#11 {main}
  thrown

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