Fatal error with language files

  • Resolved mistercode

    (@mistercode)


    5 months, 2 weeks ago

    Hi guys.

    I wanted to test this plugin, but when I activate it, a white screen appears and a fatal error occurs. After investigating, I found that the reason for this is a major problem in the language files. I tried de_DE and de_CH myself, but this fatal error occurs in several files.

    [14-Oct-2025 08:34:59 UTC] PHP Fatal error: Uncaught ValueError: Unknown format specifier "S" in \wp-content\plugins\best-woocommerce-feed\admin\class-rex-product-feed-admin.php:329

    So I checked the language files and discovered a syntax error in the string formatting.

    The reason for this is that you are using % s with spaces instead of %s, and sometimes also % S in capital letter. Both of these will cause a serious error.

    I have also noticed that this problem occurs in several language files, not just in de_DE and de_CH.

    I would also like to point out that German and German (Switzerland) have two language variants—formal and informal—which are not taken into account in your language files.

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  • Plugin Support Md Razun Mia

    (@mdrazunmia)

    5 months, 2 weeks ago

    Hi @mistercode,

    Thank you so much for taking the time to investigate and share those details — really appreciate your thorough feedback.

    I wanted to let you know that the issue with the language files (invalid format specifiers like “% s” and “% S”) has already been resolved, and a fix was released yesterday in the latest version of the Product Feed Manager plugin.

    Please update the plugin to the newest version [7.4.51 (2025-10-14)], and the fatal error should no longer occur when activating it. Let us know your feedback.

    Also, do consider helping us out with a quick 5-star rating here if you are happy with our fast support and with our product.

    Best Regards,

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