#0 src/XF/Mvc/Entity/Entity.php(716): DBTech\eCommerce\Entity\ShippingMethod->verifyCostFormula('', 'cost_formula', 5, Array)
#1 src/XF/Mvc/Entity/Entity.php(570): XF\Mvc\Entity\Entity->_verifyValueCustom('', 'cost_formula', 5, Array)
#2 src/XF/Mvc/Entity/Entity.php(674): XF\Mvc\Entity\Entity->set('cost_formula', '', Array)
#3 src/XF/Mvc/FormAction.php(34): XF\Mvc\Entity\Entity->bulkSet(Array)
#4 src/XF/Mvc/FormAction.php(136): XF\Mvc\FormAction->XF\Mvc\{closure}(Object(XF\Mvc\FormAction))
#5 src/addons/DBTech/eCommerce/Admin/Controller/ShippingMethod.php(126): XF\Mvc\FormAction->run()
#6 src/XF/Mvc/Dispatcher.php(249): DBTech\eCommerce\Admin\Controller\ShippingMethod->actionSave(Object(XF\Mvc\ParameterBag))
#7 src/XF/Mvc/Dispatcher.php(88): XF\Mvc\Dispatcher->dispatchClass('DBTech\\eCommerc...', 'Save', 'json', Object(XF\Mvc\ParameterBag), 'dbtechEcomShipp...', Object(DBTech\eCommerce\Admin\Controller\ShippingMethod), NULL)
#8 src/XF/Mvc/Dispatcher.php(41): XF\Mvc\Dispatcher->dispatchLoop(Object(XF\Mvc\RouteMatch))
#9 src/XF/App.php(1931): XF\Mvc\Dispatcher->run()
#10 src/XF.php(328): XF\App->run()
#11 admin.php(13): XF::runApp('XF\\Admin\\App')
#12 {main}