Fatal error
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Dear Sirs,
I’m not able to put the Bookit plugin into run. Always when I try to book an appointment the site freezes, the appointment is booked on back-end, but no mails are sent and in the logs I’m having several errors. I’m not a coder, therefore cannot debug this. Can you please help me or give some advice, what I can do. Other plugins all disabled and tried without them as well, but same error. WP 5.8.2, php 8.0.13 – Errorlog for ex:
PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method Bookit\\Classes\\Notifications::check_sender_email() cannot be called statically in /var/www/clients/client1068/web2354/web/wp-includes/class-wp-hook.php:303\nStack trace:\n#0 /var/www/clients/client1068/web2354/web/wp-includes/plugin.php(189): WP_Hook->apply_filters()\n#1 /var/www/clients/client1068/web2354/web/wp-includes/pluggable.php(396): apply_filters()\n#2 /var/www/clients/client1068/web2354/web/wp-content/plugins/bookit/includes/classes/Notifications.php(72): wp_mail()\n#3 /var/www/clients/client1068/web2354/web/wp-content/plugins/bookit/includes/classes/Notifications.php(86): Bookit\\Classes\\Notifications::sent_mail()\n#4 /var/www/clients/client1068/web2354/web/wp-includes/class-wp-hook.php(303): Bookit\\Classes\\Notifications::appointment_created()\n#5 /var/www/clients/client1068/web2354/web/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()\n#6 /var…’
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