Uncaught Error: Class ‘Epsilon_Section_Pro’ not found in … customizer.php

Hello.

I get an error on one of the websites I own, that runs on Shapely.

Uncaught Error: Class ‘Epsilon_Section_Pro’ not found in ../customizer.php:81
Stack trace:
#0 /home/poftab/public_html/wp-includes/class-wp-hook.php(286): shapely_customizer(Object(WP_Customize_Manager))
#1 /home/poftab/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /home/poftab/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /home/poftab/public_html/wp-includes/class-wp-customize-manager.php(928): do_action(‘customize_regis…’, Object(WP_Customize_Manager))
#4 /home/poftab/public_html/wp-includes/class-wp-hook.php(286): WP_Customize_Manager->wp_loaded(”)
#5 /home/poftab/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#6 /home/poftab/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#7 /home/poftab/public_html/wp-settings.php(546): do_action(‘wp_loaded’)
#8 /home/poftab/public_html/wp-config.php(60): require_once(‘/home/poftab/pu…’)

Can I just delete the customizer.php file from the theme? Is there anything I could add to it?

Thank you for your support.
Happy Holidays ??