Getting Error in woocommerce-multistep-checkout

Dear Folks,

This is my first time in WordPress Support fourum. I need help to resolve a issue.

I have been assigned a WordPress website and i am managing it since couple of months, all was well but suddenly Site stopped working and when i checked the error logs i could find the error coming from a plugin woo commerce-multistep-checkout so i renamed that folder and site started loading fine

But noticed that site is broken where ever woo commerce short codes were used like
[products columns=”1″ order=”date” orderby=”ASC”]
[woocommerce_my_account]

and also unable to login into my admin panel, since i was using
<domain_name>/my-account ( Screenshot : https://prnt.sc/E265L1xr9elJ )
to login to my admin panel (not the usual way of <domain.tls>/wp-admin)and click on DASHBOARD top menu from there i was accessing admin panel,
This is way of accessing it because of wp-admin is not working
https://prnt.sc/0Kl6UDM1_y9G

My Concern is to resolve the woocommerce-multistep-checkout issue which is causing the site to go down.

ERROR :

PHP Fatal error: Uncaught Error: Call to undefined function is_checkout() in /var/www/html/<FOLDER_NAME>/wp-content/plugins/woocommerce-multistep-checkout/woocommerce-multistep-checkout.php:116\nStack trace:\n#0 /var/www/html/<FOLDER_NAME>/wp-includes/class-wp-hook.php(303): wmc_load_scripts()\n#1 /var/www/html/<FOLDER_NAME>/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()\n#2 /var/www/html/<FOLDER_NAME>/wp-includes/plugin.php(470): WP_Hook->do_action()\n#3 /var/www/html/<FOLDER_NAME>/wp-includes/script-loader.php(2083): do_action()\n#4 /var/www/html/<FOLDER_NAME>/wp-includes/class-wp-hook.php(303): wp_enqueue_scripts()\n#5 /var/www/html/<FOLDER_NAME>/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()\n#6 /var/www/html/<FOLDER_NAME>/wp-includes/plugin.php(470): WP_Hook->do_action()\n#7 /var/www/html/<FOLDER_NAME>/wp-includes/general-template.php(3015): do_action()\n#8 /var/www/html/<FOLDER_NAME>/wp-content/themes/tigovit/header.php(69): wp_head()\n#9 /var/www/html/<FOLDER_NAME>/wp-includes/template.php(770): require_once('/va in /var/www/html/<FOLDER_NAME>/wp-content/plugins/woocommerce-multistep-checkout/woocommerce-multistep-checkout.php on line 116

The page I need help with: [log in to see the link]