Enroll Student Using WooCommerce Order API

[0xrmd]

When I try To Enroll Student To Tutor lms From App Using WooCommerce REST API using https://zamakane.com/wp-json/wc/v3/orders And This Body in Postman

{
    "status": "completed",
      "set_paid": true,
      "billing": {
        "address_1": "1234 Main Street",
        "city": "Alger",
        "first_name": "Mohamed",
        "last_name": "Mohamed",
        "email": "rami63879@gmail.com",
        "phone": "0555555555"
      },
      "shipping": {
        "first_name": "Mohamed",
        "last_name": "Mohamed",
        "address_1": "1234 Main Street",
        "city": "Alger",
        "state": "DZ",
        "postcode": "16000",
        "country": "DZ",
        "phone": "0555555555"
      },
      "line_items": [
        {"product_id": "8585", "quantity": 1}
      ],
      "coupon_lines": [
        {"code": "rueptb53"}
      ]
}

I Get response Code 500
This is Full response
{
"code": "internal_server_error",
"message": "

كان هناك خطأ فادح في هذا الموقع.

<a href="https://wordpress.org/documentation/article/faq-troubleshooting/\">معرفة المزيد حول استكشاف الأخطاء في ووردبريس.

",
"data": {
"status": 500,
"error": {
"type": 1,
"message": "Uncaught Error: Call to a member function has_session() on null in /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/tutor/classes/WooCommerce.php:694\nStack trace:\n#0 /home/u262783969/domains/zamakane.com/public_html/wp-includes/class-wp-hook.php(324): TUTOR\WooCommerce->course_placing_order_from_customer()\n#1 /home/u262783969/domains/zamakane.com/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#2 /home/u262783969/domains/zamakane.com/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()\n#3 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/data-stores/abstract-wc-order-item-type-data-store.php(93): do_action()\n#4 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/class-wc-data-store.php(186): Abstract_WC_Order_Item_Type_Data_Store->create()\n#5 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-data.php(241): WC_Data_Store->create()\n#6 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-order.php(293): WC_Data->save()\n#7 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-order.php(225): WC_Abstract_Order->save_items()\n#8 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(270): WC_Abstract_Order->save()\n#9 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-orders-controller.php(274): WC_Order->save()\n#10 /home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-crud-controller.php(205): WC_REST_Orders_Controller->save_object()\n#11 /home/u262783969/domains/zamakane.com/public_html/wp-includes/rest-api/class-wp-rest-server.php(1292): WC_REST_CRUD_Controller->create_item()\n#12 /home/u262783969/domains/zamakane.com/public_html/wp-includes/rest-api/class-wp-rest-server.php(1125): WP_REST_Server->respond_to_request()\n#13 /home/u262783969/domains/zamakane.com/public_html/wp-includes/rest-api/class-wp-rest-server.php(439): WP_REST_Server->dispatch()\n#14 /home/u262783969/domains/zamakane.com/public_html/wp-includes/rest-api.php(449): WP_REST_Server->serve_request()\n#15 /home/u262783969/domains/zamakane.com/public_html/wp-includes/class-wp-hook.php(324): rest_api_loaded()\n#16 /home/u262783969/domains/zamakane.com/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#17 /home/u262783969/domains/zamakane.com/public_html/wp-includes/plugin.php(565): WP_Hook->do_action()\n#18 /home/u262783969/domains/zamakane.com/public_html/wp-includes/class-wp.php(418): do_action_ref_array()\n#19 /home/u262783969/domains/zamakane.com/public_html/wp-includes/class-wp.php(813): WP->parse_request()\n#20 /home/u262783969/domains/zamakane.com/public_html/wp-includes/functions.php(1336): WP->main()\n#21 /home/u262783969/domains/zamakane.com/public_html/wp-blog-header.php(16): wp()\n#22 /home/u262783969/domains/zamakane.com/public_html/index.php(17): require('/home/u26278396...')\n#23 {main}\n thrown",
"file": "/home/u262783969/domains/zamakane.com/public_html/wp-content/plugins/tutor/classes/WooCommerce.php",
"line": 694
}
},
"additional_errors": []
}
Please Help To Fix This