Fatal error: Uncaught TypeError: App\models\templateRenderModel::renderString(): Argument #1 ($template) must be of type string, null given, called in /home/dh_b8fvyv/kilowatts.uk/src/controllers/modelsController.php on line 866 and defined in /home/dh_b8fvyv/kilowatts.uk/src/models/templateRenderModel.php:19 Stack trace: #0 /home/dh_b8fvyv/kilowatts.uk/src/controllers/modelsController.php(866): App\models\templateRenderModel->renderString(NULL, Object(stdClass)) #1 /home/dh_b8fvyv/kilowatts.uk/src/controllers/modelsController.php(1024): App\controllers\modelsController->parsePageModelLoopA(Object(App\controllers\pageController), Array, Object(stdClass)) #2 /home/dh_b8fvyv/kilowatts.uk/src/controllers/modelsController.php(965): App\controllers\modelsController->parsePageModelLoopA(Object(App\controllers\pageController), Array, Object(stdClass)) #3 /home/dh_b8fvyv/kilowatts.uk/src/controllers/modelsController.php(385): App\controllers\modelsController->parsePageModelLoopA(Object(App\controllers\pageController), Array, Object(stdClass)) #4 /home/dh_b8fvyv/kilowatts.uk/src/controllers/modelsController.php(860): App\controllers\modelsController->parseModelToString(Object(stdClass), Object(App\controllers\pageController), Object(stdClass)) #5 /home/dh_b8fvyv/kilowatts.uk/src/controllers/modelsController.php(1083): App\controllers\modelsController->parsePageModelLoopA(Object(App\controllers\pageController), Array) #6 /home/dh_b8fvyv/kilowatts.uk/src/controllers/pageController.php(52): App\controllers\modelsController->parsePageModel(Object(App\controllers\computationController), Object(App\controllers\pageController)) #7 /home/dh_b8fvyv/kilowatts.uk/src/controllers/appController.php(984): App\controllers\pageController->parsePageModel(Object(App\controllers\computationController)) #8 /home/dh_b8fvyv/kilowatts.uk/src/controllers/appController.php(65): App\controllers\appController->next() #9 /home/dh_b8fvyv/kilowatts.uk/public/index.php(10): App\controllers\appController->init() #10 {main} thrown in /home/dh_b8fvyv/kilowatts.uk/src/models/templateRenderModel.php on line 19