PHP Fatal error: Uncaught Error: Class ‘WC_Shipping_Method’ not found

Hi,

I have got a critical error from this plugin since a few days, first occurrence happened on 14-Sep-2022 23:40:14 UTC and I cannot access the admin anymore because of that error.

[14-Sep-2022 23:40:14 UTC] PHP Fatal error: Uncaught Error: Class ‘WC_Shipping_Method’ not found in […]/wp-content/plugins/flexible-shipping/classes/table-rate/flexible-shipping-settings.php:21
Stack trace:
#0 […]/wp-content/plugins/flexible-shipping/vendor/composer/ClassLoader.php(444): include()
#1 […]/wp-content/plugins/flexible-shipping/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile(‘/homepages/43/d…’)
#2 [internal function]: Composer\Autoload\ClassLoader->loadClass(‘WPDesk_Flexible…’)
#3 […]/wp-content/plugins/flexible-shipping/classes/class-flexible-shipping-plugin.php(817): spl_autoload_call(‘WPDesk_Flexible…’)
#4 […]/wp-includes/class-wp-hook.php(309): Flexible_Shipping_Plugin->links_filter(Array)
#5 […]/wp-includes/plugin.php(191): WP_Hook->apply_filters(Array, Array)
#6 […]/wp-content/plugins/flexible-shipping/classes/table-rate/flexible-shipping-settings.php on line 21

I checked my updates logs, there was no update around that time that could have caused that error, also no plugin was installed around the same time, so I’m a bit stuck honestly.

I’m on PHP 7.4, updated to 8.0 to check if the problem persisted (and it persisted indeed). WordPress version is 6.0.2, the update was done on August 31st.

Thanks,