LogicException: Instances of XF\Db\AbstractAdapter cannot be serialized or unserialized in src/XF/Db/AbstractAdapter.php at line 680
XF\Db\AbstractAdapter->__sleep()
serialize() in src/XF/Mail/Queue.php at line 27
XF\Mail\Queue->queue() in src/XF/Mail/Mailer.php at line 318
XF\Mail\Mailer->queue() in src/XF/Mail/Mail.php at line 412
XF\Mail\Mail->queue() in src/addons/SV/EmailQueue/XF/Mail/Mail.php at line 34
SV\EmailQueue\XF\Mail\Mail->send() in src/XF/Admin/Controller/Tools.php at line 278
XF\Admin\Controller\Tools->actionTestEmail() in src/XF/Mvc/Dispatcher.php at line 321
XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 244
XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 100
XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 50
XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2178
XF\App->run() in src/XF.php at line 390
XF::runApp() in admin.php at line 13