Internal Server Error

Hi, None of my orders have been able to pay via Paypal as the system crashes with the below message


Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, This email address is being protected from spambots. You need JavaScript enabled to view it. and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

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Apache/2 Server at www.mohairbearmakingsupplies.co.uk Port 80

This is from my sever error log, not sure if it points to the error?

[Mon Feb 28 18:34:15 2011] [error] [client 88.96.34.246] PHP Warning: htmlspecialchars() expects parameter 1 to be string, array given in /home/sites/mohairbearmakingsupplies.co.uk/public_html/plugins/hikashoppayment/paypal_end.php on line 25, referer: www.mohairbearmakingsupplies.co.uk/index...l=checkout&Itemid=25

thanks

Hi, don't think I have changed anything that would have caused it, I have installed a few plug ins though, I will uninstall them and try that.

Hi, I have uninstalled the plugins and it still does not work? I have now taken the site off line as I have some very irate customers.

Still cannot get it to work, uninstalled the plugins, updated etc.

The common error message from my server is:

Mon Feb 28 18:34:15 2011] [error] [client 88.96.34.246] PHP Warning: htmlspecialchars() expects parameter 1 to be string, array given in /home/sites/mohairbearmakingsupplies.co.uk/public_html/plugins/hikashoppayment/paypal_end.php on line 25, referer: www.mohairbearmakingsupplies.co.uk/index...eckout&Itemid=25


this is the file can you see anything wrong?

<?php
/**
* @package HikaShop for Joomla!
* @version 1.4.5
* @author hikashop.com
* @copyright (C) 2010 HIKARI SOFTWARE. All rights reserved.
* @license GNU/GPLv3 www.gnu.org/licenses/gpl-3.0.html
*/
defined('_JEXEC') or die('Restricted access');
?>
<div class="hikashop_paypal_end" id="hikashop_paypal_end">
<span id="hikashop_paypal_end_message" class="hikashop_paypal_end_message">
<?php echo JText::_('PLEASE_WAIT_BEFORE_REDIRECTION_TO_PAYPAL').'<br/>'. JText::_('CLICK_ON_BUTTON_IF_NOT_REDIRECTED');?>
</span>
<span id="hikashop_paypal_end_spinner" class="hikashop_paypal_end_spinner">
<img src="<?php echo HIKASHOP_IMAGES.'spinner.gif';?>" />
</span>
<br/>
<form id="hikashop_paypal_form" name="hikashop_paypal_form" action="<?php echo $method->payment_params->url;?>" method="post">
<div id="hikashop_paypal_end_image" class="hikashop_paypal_end_image">
<input id="hikashop_paypal_button" type="submit" value="" name="" alt="Click to pay with PayPal - it is fast, free and secure!" />
</div>
<?php
foreach( $vars as $name => $value ) {
echo '<input type="hidden" name="'.$name.'" value="'.htmlspecialchars($value).'" />';
}
$doc =& JFactory::getDocument();
$doc->addScriptDeclaration("do_nothing( function() {document.getElementById('hikashop_paypal_form').submit();});");
JRequest::setVar('noform',1);
?>
</form>
</div>