latest version 4.1.19.4
system log entry
TypeError: DateTime::__construct() expects parameter 2 to be DateTimeZone, string given (0)
#0 /xxxxxx/system/Helpers/Form/Date.php(207): DateTime->__construct('2017-01-02 23:0...', 'UTC')
#1 /xxxxxx/system/Helpers/Form/FormAbstract.php(165): IPS\Helpers\Form\_Date->formatValue()
#2 /xxxxxx/system/Helpers/Form/FormAbstract.php(143): IPS\Helpers\Form\_FormAbstract->setValue(true)
#3 [internal function]: IPS\Helpers\Form\_FormAbstract->__construct('newsletter_star...', 1483398000, true, Array, NULL, NULL, NULL, 'newsletter_star...')
#4 /xxxxxx/system/Helpers/Form/Date.php(90): call_user_func_array('parent::__const...', Array)
#5 /xxxxxx/applications/newsletters/sources/Newsletter/Newsletter.php(156): IPS\Helpers\Form\_Date->__construct('newsletter_star...', 1483398000, true, Array, NULL, NULL, NULL, 'newsletter_star...')
#6 /xxxxxx/applications/newsletters/modules/admin/newsletters/newsletters.php(189): IPS\newsletters\_Newsletter->form(Object(IPS\Helpers\Form))
#7 /xxxxxx/system/Dispatcher/Controller.php(86): IPS\newsletters\modules\admin\newsletters\_newsletters->form()
#8 /xxxxxx/applications/newsletters/modules/admin/newsletters/newsletters.php(27): IPS\Dispatcher\_Controller->execute()
#9 /xxxxxx/system/Dispatcher/Dispatcher.php(129): IPS\newsletters\modules\admin\newsletters\_newsletters->execute()
#10 /xxxxxx/admin/index.php(14): IPS\_Dispatcher->run()
#11 {main}