When plugin is active im unable to save any products

When we try and update any product that uses variations…we get the following error, which only seems to happen when your product variations swatches plugin is enabled.

Fatal error: Uncaught Error: Call to a member function get_variation() on bool
in /var/www/agile.s4cms.co.uk/htdocs/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php on line 294

Call stack:

WC_Meta_Box_Product_Data::prepare_set_attributes()
wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php:405
WC_Meta_Box_Product_Data::save()
wp-includes/class-wp-hook.php:307
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:331
WP_Hook::do_action()
wp-includes/plugin.php:474
do_action()
wp-content/plugins/woocommerce/includes/admin/class-wc-admin-meta-boxes.php:224
WC_Admin_Meta_Boxes::save_meta_boxes()
wp-includes/class-wp-hook.php:309
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:331
WP_Hook::do_action()
wp-includes/plugin.php:474
do_action()
wp-includes/post.php:4687
wp_insert_post()
wp-includes/post.php:4789
wp_update_post()
wp-admin/includes/post.php:426
edit_post()
wp-admin/post.php:227