plugin make issue

Howdy!

Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, Variation Swatches for WooCommerce – Pro.

First, visit your website (https://appleshoes.net/) and check for any visible issues. Next, visit the page where the error was caught (https://appleshoes.net/wp-login.php) and check for any visible issues.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 5.6.1
Current theme: Kapee (version 1.3.4)
Current plugin: Variation Swatches for WooCommerce – Pro (version 1.1.8)
PHP version 7.4.14

Error Details
=============
An error of type E_ERROR was caused in line 9 of the file /www/appleshoesnet_992/public/wp-content/plugins/woo-variation-swatches-pro/includes/functions.php. Error message: Uncaught Error: Call to a member function get() on null in /www/appleshoesnet_992/public/wp-content/plugins/woo-variation-swatches-pro/includes/functions.php:9
Stack trace:
#0 /www/appleshoesnet_992/public/wp-includes/class-wp-hook.php(287): wvs_pro_cache_variation_ajax(Array)
#1 /www/appleshoesnet_992/public/wp-includes/plugin.php(212): WP_Hook->apply_filters(Array, Array)
#2 /www/appleshoesnet_992/public/wp-includes/functions.php(1465): apply_filters(‘nocache_headers’, Array)
#3 /www/appleshoesnet_992/public/wp-includes/functions.php(1487): wp_get_nocache_headers()
#4 /www/appleshoesnet_992/public/wp-content/plugins/jetpack/modules/protect/blocked-login-page.php(354): nocache_headers()
#5 /www/appleshoesnet_992/public/wp-content/plugins/jetpack/modules/protect/blocked-login-page.php(306): Jetpack_Protect_Blocked_Login_Page->display_page(‘Jetpack has loc…’, ‘Your IP a…’, NULL, true)
#6 /www/appleshoesnet_992/public/wp-content/plugins/jetpack/modules/protect/blocked-login-page.php(312): Jetpack_Prot