New user register form not rendering in PrestaShop 1.7.0.5

[TheSebah]

As the title states the user register up form doesn't show up at all. It doesn't show up on its dedicated sign up page, nor on the checkout page. I switched debugging on an this is the error that's being thrown.

ContextErrorException in AbstractForm.php line 155:

Warning: Invalid argument supplied for foreach()


in AbstractForm.php line 155 at ErrorHandler->handleError('2', 'Invalid argument supplied for foreach()', 'PATH/public_html/classes/form/AbstractForm.php', '155', array('params' => array('create_account' => '1', 'isolang' => 'ro', 'id_lang' => '1', 'controller' => 'authentication'), 'newFields' => null, 'this' => object(CustomerForm))) in AbstractForm.php line 155

at AbstractFormCore->fillWith(array('create_account' => '1', 'isolang' => 'ro', 'id_lang' => '1', 'controller' => 'authentication')) in AuthController.php line 42

at AuthControllerCore->initContent() in Controller.php line 201

at ControllerCore->run() in Dispatcher.php line 366

at DispatcherCore->dispatch() in index.php line 28

(for a much better formatted version please check the screenshot)

I've also checked the error_log and this is what I found there

PHP Fatal error: Uncaught --> Smarty: Missing template name <-- thrown in /PATH/public_html/vendor/prestashop/smarty/sysplugins/smarty_internal_template.php on line 680

PHP Warning: Invalid argument supplied for foreach() in /PATH/public_html/classes/form/AbstractForm.php on line 155

PHP Warning: Invalid argument supplied for foreach() in /PATH/public_html/classes/form/AbstractForm.php on line 76

PHP Warning: array_map(): Argument #2 should be an array in /PATH/public_html/classes/form/CustomerForm.php on line 162

I'm running PrestaShop 1.7.0.5, using the Classic theme and I haven't changed anything in the template files.