Проблема с отправкой заказа

Добрый вечер!

Никак не могу побороть возникшую проблему с формой отправки заказа.
В корзину товар добавляется, пересчитывается, но по нажатию на кнопку «Сделать заказ» ничего не происходит.

В консоли пишется ошибка:

POST td-eurosnab.com/assets/components/minishop2/action.php 500 (Internal Server Error)

jquery.min.js:4send jquery.min.js:4m.extend.ajax jquery.min.js:4m.(anonymous function) jquery.min.js:4(anonymous function) default.js:125miniShop2.send default.js:148miniShop2.Order.submit default.js:417miniShop2.controller default.js:70(anonymous function) default.js:46m.event.dispatch jquery.min.js:3r.handle

Вызов на странице корзины выглядит так:

[[!msCart]] [[!msOrder]]



tpl.msOrder.outer:

<form class="form-horizontal ms2_form" id="msOrder" method="post">

	<div class="row">

		<div class="span6 col-md-6">

			<h4>[[%ms2_frontend_credentials]]:</h4>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label" for="email"><span class="required-star">*</span> [[%ms2_frontend_email]]</label>

				<div class="col-sm-6">

					<input type="email" id="email" placeholder="[[%ms2_frontend_email]]" name="email" value="[[+email]]" class="form-control [[+errors.email]]">

				</div>

			</div>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label"  for="receiver"><span class="required-star">*</span> [[%ms2_frontend_receiver]]</label>

				<div class="col-sm-6">

					<input type="text" id="receiver" placeholder="[[%ms2_frontend_receiver]]" name="receiver" value="[[+receiver]]" class="form-control [[+errors.receiver]]">

				</div>

			</div>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label"  for="phone"><span class="required-star">*</span> [[%ms2_frontend_phone]]</label>

				<div class="col-sm-6">

					<input type="text" id="phone" placeholder="[[%ms2_frontend_phone]]" name="phone" value="[[+phone]]" class="form-control [[+errors.phone]]">

				</div>

			</div>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label"  for="comment"><span class="required-star">*</span> [[%ms2_frontend_comment]]</label>

				<div class="col-sm-6">

					<textarea name="comment" id="comment" placeholder="[[%ms2_frontend_comment]]" class="form-control [[+errors.comment]]">[[+comment]]</textarea>

				</div>

			</div>

		</div>

		<div class="span6 col-md-6" id="payments">

			<h4>[[%ms2_frontend_payments]]:</h4>

			<div class="form-group">

				<label class="col-sm-4 control-label" ><span class="required-star">*</span> [[%ms2_frontend_payment_select]]</label>

				<div class="col-sm-6">

					[[+payments]]

				</div>

			</div>

		</div>

	</div>

	<div class="row">

		<div class="span6 col-md-6" id="deliveries">

			<h4>[[%ms2_frontend_deliveries]]:</h4>

			<div class="form-group">

				<label class="col-sm-4 control-label" ><span class="required-star">*</span> [[%ms2_frontend_delivery_select]]</label>

				<div class="col-sm-6">

					[[+deliveries]]

				</div>

			</div>

		</div>

		<div class="span6 col-md-6">

			<h4>[[%ms2_frontend_address]]:</h4>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label" for="index"><span class="required-star">*</span> [[%ms2_frontend_index]]</label>

				<div class="col-sm-4">

					<input type="text" id="index" placeholder="[[%ms2_frontend_index]]"  name="index" value="[[+index]]" class="form-control [[+errors.index]]">

				</div>

			</div>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label"  for="region"><span class="required-star">*</span> [[%ms2_frontend_region]]</label>

				<div class="col-sm-6">

					<input type="text" id="region" placeholder="[[%ms2_frontend_region]]" name="region" value="[[+region]]" class="form-control [[+errors.region]]">

				</div>

			</div>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label"  for="city"><span class="required-star">*</span> [[%ms2_frontend_city]]</label>

				<div class="col-sm-6">

					<input type="text" id="city" placeholder="[[%ms2_frontend_city]]" name="city" value="[[+city]]" class="form-control [[+errors.city]]">

				</div>

			</div>

			<div class="form-group input-parent">

				<label class="col-sm-4 control-label"  for="street"><span class="required-star">*</span> [[%ms2_frontend_street]]</label>

				<div class="col-md-6">

					<div class="col-md-4">

						<input type="text" id="street" placeholder="[[%ms2_frontend_street]]" name="street" value="[[+street]]" class="form-control [[+errors.street]]">

					</div>

					<div class="col-md-4">

						<input type="text" id="building" placeholder="[[%ms2_frontend_building]]" name="building" value="[[+building]]" class="form-control [[+errors.building]]">

					</div>

					<div class="col-md-4">

						<input type="text" id="room" placeholder="[[%ms2_frontend_room]]" name="room" value="[[+room]]" class="form-control [[+errors.room]]">

					</div>

				</div>

			</div>

		</div>

	</div>

	<button type="button" name="ms2_action" value="order/clean" class="btn btn-default ms2_link"><i class="glyphicon glyphicon-remove"></i> [[%ms2_frontend_order_cancel]]</button>

	<hr/>

	<div class="well">

		<div class="col-md-offset-2">

			<h3>[[%ms2_frontend_order_cost]]: <span id="ms2_order_cost">[[+order_cost:default=`0`]]</span> [[%ms2_frontend_currency]]</h3>

			<button type="submit" name="ms2_action" value="order/submit" class="btn btn-default btn-primary ms2_link">[[%ms2_frontend_order_submit]]</button>

		</div>

	</div>

</form>

Куда необходимо копать?