Critical error when plugin activated

Hi,
Thanks for reaching out, and sorry for the trouble — I understand the timing is tight with your Monday opening, so let’s get this sorted quickly.

The good news: since the pages work again as soon as you deactivate the plugin, this is almost certainly a single, identifiable error (a PHP conflict or a fatal on the product page). A debug log will usually let me pinpoint it straight away.

Could you enable logging and send me what it records? Here’s how:

1. Edit your site’s wp-config.php file (in the WordPress root folder). Just above the line that says /* That's all, stop editing! Happy publishing. */, add these three lines:define( 'WP_DEBUG', true );define( 'WP_DEBUG_LOG', true );define( 'WP_DEBUG_DISPLAY', false );(WP_DEBUG_DISPLAY is set to false on purpose, so your visitors won’t see any error messages while the shop is live.)
2. With the Vanquish plugin active, open one of the product pages that breaks. This makes WordPress record the error.
3. Open the file wp-content/debug.log and copy me its contents (or just the last section, from the moment you loaded the page).

If the debug log shows nothing related to the plugin, the issue may be in the browser instead. In that case, please also open the broken product page, press F12 to open the browser console, and copy me any errors shown in red under the “Console” tab.

You can reply here or — if it’s easier to attach the log file — open a ticket here and attach it directly: https://vanquishplugins.com/support/

Once you’ve turned debugging on and captured the log, feel free to set those three lines back to false (or remove them).

Fixed