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Site Crashes When the VAT Plugin Is Active

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If your site crashes with a fatal or memory error only while EU/UK VAT Manager for WooCommerce is active, the cause is almost always a plugin or theme conflict or a low PHP memory limit. Deactivate the plugin to restore access, update everything, raise the memory limit, and then test for conflicts with a default theme.

Symptoms #

  • PHP fatal error such as “Allowed memory size of … bytes exhausted” when the plugin is active.
  • The site works normally as soon as the plugin is deactivated.

Cause #

This is almost always a conflict with another plugin or theme (commonly a multi-language plugin, custom checkout, or page builder) or a very low PHP memory limit on the host, rather than the VAT plugin alone.

Fix #

  1. Restore access. Deactivate the plugin from WP admin, or rename its folder over FTP if the dashboard is unreachable.
  2. Update everything. Update the plugin, WordPress and WooCommerce to their latest versions.
  3. Raise the PHP memory limit temporarily, for example add define('WP_MEMORY_LIMIT','256M'); to wp-config.php, then re-test.
  4. Test for conflicts. Switch to a default theme and disable other plugins, then reactivate the VAT plugin. Re-enable the others one at a time to find the culprit.
  5. Collect details. If it still crashes, turn on WP_DEBUG, capture the file and function in the error, and send it to support with your PHP version, memory limit and active plugin list.

Prerequisites #

  • Access to WP admin, FTP, or your hosting control panel.
  • Ability to edit PHP settings on your host.

Need a hand? #

Test plugin updates on a staging site first, then reach the team on the EU/UK VAT Manager support forum with your debug log.

 

EU VAT Manager for WooCommerce