Critical Error with YITH Custom Thank You Page for Woocommerce Premium

Hi I’m having issues with a website I’ve been asked to troubleshoot.

When trying to edit some pages a critical error occurs which seems to be linked to the Yith Custom Thank You Page plugin.

There has been a critical error on this website. Please check your site admin email inbox for instructions.

Learn more about debugging in WordPress.

The same critical error also shows when editing a woocommerce product when clicking on the custom thank you page link at the bottom.

The custom thank you pages have largely been done with elementor. Are there compatibility issues between the two or is something else likely to be the issue.

Also received an automated email which contained text below (URIs slightly redacted), many thanks for any help you can provide;

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, YITH Custom ThankYou Page for Woocommerce Premium.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 5.6.2
Current theme: BuddyBoss Child (version 1.0.0) Current plugin: YITH Custom ThankYou Page for Woocommerce Premium (version 1.3.1) PHP version 7.3.27-1+0~20210211.76+debian9~1.gbp8355b8

Error Details
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An error of type E_ERROR was caused in line 827 of the file /home/.../public_html/wp-content/plugins/yith-custom-thankyou-page-for-woocommerce-premium/includes/class.yith-custom-thankyou-page-admin-premium.php. Error message: Uncaught Error: Call to a member function get_type() on bool in /home/.../public_html/wp-content/plugins/yith-custom-thankyou-page-for-woocommerce-premium/includes/class.yith-custom-thankyou-page-admin-premium.php:827
Stack trace:
#0 /home/.../public_html/wp-includes/class-wp-hook.php(287): YITH_Custom_Thankyou_Page_Admin_Premium->yit_ctpw_add_panel_tab_content('')
#1 /home/.../public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#2 /home/.../public_html/wp-includes/plugin.php(484): WP_Hook->do_action(Array)
#3 /home/.../public_html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-product-data-panel.php(53): do_action('woocommerce_pro...')
#4 /home/.../public_html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php(33): include('/ho