Fatal error when changing order status

  • David_

    (@david_peris)


    10 months, 1 week ago

    Hi,

    I’m experiencing a critical error on my WooCommerce site when manually changing an order status from “Processing” to “Completed”. The customer sees the generic message:
    “There has been a critical error on this website.”
    After refreshing the page, everything works normally, but the process is interrupted momentarily.

    Checking the server error logs, I found this fatal error:

    [01-Aug-2025 09:51:59 UTC] PHP Fatal error: Uncaught Error: Call to undefined method ObjectCacheDisk::decrement() in /home/jydpelyy/public_html/wp-content/object-cache.php on line 653

    It seems that Object Cache 4 Everyone is calling the method decrement() on an instance of ObjectCacheDisk, but this method is not defined in that class.
    That causes a fatal error when certain actions trigger that method—possibly during the customer notification process when completing an order.

    Could you confirm if Object Cache 4 Everyone is expected to support decrement(), or if this is a bug or compatibility issue?
    Also, is there any recommended fix or workaround, short of disabling object caching?

    As a temporary fix, I’ve disabled object-cache.php to disable persistent object caching, which prevents the error.

    Thanks in advance for your support.

    • This topic was modified 10 months, 1 week ago by David_.

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