Cannot install plug-in + CORE

Hi,

I just installed  "b2bking-the-ultimate-woocommerce-b2b-plugin-wordpress-plugin" from envato. After installing this i had to download the "Core" add-on from my WordPress dashboard. When i'm trying to install this from wp dashboard it's not working ... When i install the plugin manually i'm getting a critical error (see e-mail text below). I'm running all latest version of WordPress, elementor (pro), hello theme.

Foutdetails

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Een fout van het type E_ERROR werd veroorzaakt op regelnummer 10593 van het bestand /home/wolfwebnl/menu.wolfweb.nl/wp-content/plugins/b2bking/admin/class-b2bking-admin.php. Foutmelding: Uncaught Error: Call to undefined function get_woocommerce_currency_symbol() in /home/wolfwebnl/menu.wolfweb.nl/wp-content/plugins/b2bking/admin/class-b2bking-admin.php:10593

Stack trace:

#0 /home/wolfwebnl/menu.wolfweb.nl/wp-includes/class-wp-hook.php(307): B2bking_Admin->load_global_admin_resources('plugins.php')

#1 /home/wolfwebnl/menu.wolfweb.nl/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)

#2 /home/wolfwebnl/menu.wolfweb.nl/wp-includes/plugin.php(474): WP_Hook->do_action(Array)

#3 /home/wolfwebnl/menu.wolfweb.nl/wp-admin/admin-header.php(118): do_action('admin_enqueue_s...', 'plugins.php')

#4 /home/wolfwebnl/menu.wolfweb.nl/wp-admin/plugins.php(605): require_once('/home/wolfwebnl...')

#5 {main}

  thrown