12 March 2014, 13:18

 When i try to edit site pages in the configure settings , the html editor doesn't appear , just a simple plain text editor and when i fill it with a text and submit "save changes" i get this error : 

TwikiBag: Site unavailable

A nonrecoverable error occurred. This probably means you have encountered a bug in the system

i checked my apache error logs and got these errors  : 

[11-Mar-2014 18:10:00 America/Denver] [WAR] 75 (lib/errors.php:448) An exception was thrown of class PieformException. 
[11-Mar-2014 18:10:00 America/Denver] [WAR] 75 (lib/errors.php:448) THIS IS BAD and should be changed to something extending MaharaException,
[11-Mar-2014 18:10:00 America/Denver] [WAR] 75 (lib/errors.php:448) unless the exception is from a third party library.
[11-Mar-2014 18:10:00 America/Denver] [WAR] 75 (lib/errors.php:448) Original trace follows
[11-Mar-2014 18:10:00 America/Denver] [WAR] 75 (lib/pieforms/pieform.php:536) Your editsitepage_submit function should use $form->reply to send a response, which should redirect or exit when it is done. Perhaps you want to make your reply callback do this?
[11-Mar-2014 18:10:00 America/Denver] Call stack (most recent first):
[11-Mar-2014 18:10:00 America/Denver]   * Pieform->__construct(array(size 4)) at /home1/crushbea/public_html/twikibag/lib/pieforms/pieform.php:170
[11-Mar-2014 18:10:00 America/Denver]   * Pieform::process(array(size 4)) at /home1/crushbea/public_html/twikibag/lib/pieforms/pieform.php:71
[11-Mar-2014 18:10:00 America/Denver]   * pieform(array(size 4)) at /home1/crushbea/public_html/twikibag/admin/site/pages.php:70
[11-Mar-2014 18:10:00 America/Denver] 

Please help me solve these errors