An unhandled error occured

Security exception - value of $_GET['SMPagesId'] = 'disclosures' is in conflict with value restriction 'Guid'

Stack trace
#0 /home/pellafin/public_html/base/SMEnvironment.class.php(89): SMEnvironment::getValidatedValue('$_GET', Array, 'SMPagesId', 'Guid', Array)
#1 /home/pellafin/public_html/extensions/SMPages/FrmViewer.class.php(32): SMEnvironment::GetQueryValue('SMPagesId', 'Guid')
#2 /home/pellafin/public_html/extensions/SMPages/FrmViewer.class.php(272): SMPagesFrmViewer->loadPage()
#3 /home/pellafin/public_html/extensions/SMPages/Main.class.php(76): SMPagesFrmViewer->Render()
#4 /home/pellafin/public_html/base/SMController.class.php(199): SMPages->Render()
#5 /home/pellafin/public_html/base/SMController.class.php(139): SMController->loadExtension('SMPages')
#6 /home/pellafin/public_html/index.php(22): SMController->Execute()
#7 {main}