The theme identifier was not set. Please check your TypoScript configuration.

[ProWebs]

Got this error on Backend with typo3 8.7.10 using the latest comits of YAG.

`Exception thrown in file
/var/www/html/htdocs/typo3conf/ext/yag/Classes/Domain/Configuration/ConfigurationBuilderFactory.php in line 94.

17 Tx_Yag_Domain_Configuration_ConfigurationBuilderFactory::getInstance("backend", NULL, boolean)

/var/www/html/htdocs/typo3conf/ext/yag/Classes/Controller/AbstractController.php:

00376:
00377: Tx_Yag_Domain_Configuration_ConfigurationBuilderFactory::injectSettings($this->settings);

00378: $this->configurationBuilder = Tx_Yag_Domain_Configuration_ConfigurationBuilderFactory::getInstance($contextIdentifier, $this->settings['theme'], $resetContext);

00379:
00380: if (TYPO3_MODE === 'FE') {

16 Tx_Yag_Controller_AbstractController::injectConfigurationManager(TYPO3\CMS\Extbase\Configuration\ConfigurationManager)

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Object/Container/Container.php:

00231: }
00232: if (is_callable([$instance, $injectMethodName])) {

00233: $instance->{$injectMethodName}($instanceToInject);

00234: }
00235: }

15 TYPO3\CMS\Extbase\Object\Container\Container::injectDependencies(Tx_Yag_Controller_GalleryController, TYPO3\CMS\Extbase\Object\Container\ClassInfo)

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Object/Container/Container.php:

00180: }
00181: $instance = $this->instanciateObject($classInfo, $givenConstructorArguments);

00182: $this->injectDependencies($instance, $classInfo);

00183: $this->initializeObject($instance, $classInfo);
00184: if (!$classIsSingleton) {

14 TYPO3\CMS\Extbase\Object\Container\Container::getInstanceInternal("Tx_Yag_Controller_GalleryController", array)

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Object/Container/Container.php:

00124: {
00125: $this->prototypeObjectsWhichAreCurrentlyInstanciated = [];

00126: return $this->getInstanceInternal($className, $givenConstructorArguments);

00127: }
00128:

13 TYPO3\CMS\Extbase\Object\Container\Container::getInstance("Tx_Yag_Controller_GalleryController", array)

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Object/ObjectManager.php:

00096: $instance = call_user_func_array([\TYPO3\CMS\Core\Utility\GeneralUtility::class, 'makeInstance'], $arguments);
00097: } else {

00098: $instance = $this->objectContainer->getInstance($objectName, $arguments);

00099: }
00100: return $instance;

12 TYPO3\CMS\Extbase\Object\ObjectManager::get("Tx_Yag_Controller_GalleryController")

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Mvc/Dispatcher.php:

00112: {
00113: $controllerObjectName = $request->getControllerObjectName();

00114: $controller = $this->objectManager->get($controllerObjectName);

00115: if (!$controller instanceof \TYPO3\CMS\Extbase\Mvc\Controller\ControllerInterface) {
00116: throw new \TYPO3\CMS\Extbase\Mvc\Exception\InvalidControllerException(

11 TYPO3\CMS\Extbase\Mvc\Dispatcher::resolveController(TYPO3\CMS\Extbase\Mvc\Web\Request)

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Mvc/Dispatcher.php:

00081: throw new \TYPO3\CMS\Extbase\Mvc\Exception\InfiniteLoopException('Could not ultimately dispatch the request after ' . $dispatchLoopCount . ' iterations. Most probably, a @ignorevalidation annotation is missing on re-displaying a form with validation errors.', 1217839467);
00082: }

00083: $controller = $this->resolveController($request);

00084: try {
00085: $controller->processRequest($request, $response);

10 TYPO3\CMS\Extbase\Mvc\Dispatcher::dispatch(TYPO3\CMS\Extbase\Mvc\Web\Request, TYPO3\CMS\Extbase\Mvc\Web\Response)

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Mvc/Web/BackendRequestHandler.php:

00030: /** @var $response \TYPO3\CMS\Extbase\Mvc\ResponseInterface */
00031: $response = $this->objectManager->get(\TYPO3\CMS\Extbase\Mvc\Web\Response::class);

00032: $this->dispatcher->dispatch($request, $response);

00033: return $response;
00034: }

9 TYPO3\CMS\Extbase\Mvc\Web\BackendRequestHandler::handleRequest()

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Core/Bootstrap.php:

00197: $requestHandler = $requestHandlerResolver->resolveRequestHandler();
00198:

00199: $response = $requestHandler->handleRequest();

00200: // If response is NULL after handling the request we need to stop
00201: // This happens for instance, when a USER object was converted to a USER_INT

8 TYPO3\CMS\Extbase\Core\Bootstrap::handleRequest()

/var/www/html/typo3_src-8.7.10/typo3/sysext/extbase/Classes/Core/Bootstrap.php:

00184: {
00185: $this->initialize($configuration);

00186: return $this->handleRequest();

00187: }
00188:

7 TYPO3\CMS\Extbase\Core\Bootstrap::run("", array)

/var/www/html/typo3_src-8.7.10/typo3/sysext/backend/Classes/Http/BackendModuleRequestHandler.php:

00180: // Run Extbase
00181: $bootstrap = GeneralUtility::makeInstance(\TYPO3\CMS\Extbase\Core\Bootstrap::class);

00182: $content = $bootstrap->run('', $configuration);

00183:
00184: $response->getBody()->write($content);

6 TYPO3\CMS\Backend\Http\BackendModuleRequestHandler::dispatchModule("web_YagTxYagM1")

/var/www/html/typo3_src-8.7.10/typo3/sysext/backend/Classes/Http/BackendModuleRequestHandler.php:

00087:
00088: $moduleName = (string)$this->request->getQueryParams()['M'];

00089: return $this->dispatchModule($moduleName);

00090: }
00091:

5 TYPO3\CMS\Backend\Http\BackendModuleRequestHandler::handleRequest(TYPO3\CMS\Core\Http\ServerRequest)

/var/www/html/typo3_src-8.7.10/typo3/sysext/core/Classes/Core/Bootstrap.php:

00313:
00314: // Execute the command which returns a Response object or NULL

00315: $this->response = $requestHandler->handleRequest($request);

00316: return $this;
00317: }

4 TYPO3\CMS\Core\Core\Bootstrap::handleRequest(TYPO3\CMS\Core\Http\ServerRequest)

/var/www/html/typo3_src-8.7.10/typo3/sysext/backend/Classes/Http/Application.php:

00090: }
00091:

00092: $this->bootstrap->handleRequest($this->request);

00093:
00094: if ($execute !== null) {

3 TYPO3\CMS\Backend\Http\Application::run()

/var/www/html/typo3_src-8.7.10/typo3/sysext/backend/Resources/Private/Php/backend.php:

00022: $classLoader = require DIR . '/../../../../../../vendor/autoload.php';
00023:

00024: (new \TYPO3\CMS\Backend\Http\Application($classLoader))->run();

00025: });

2 {closure}()

/var/www/html/typo3_src-8.7.10/typo3/sysext/backend/Resources/Private/Php/backend.php:

00023:
00024: (new \TYPO3\CMS\Backend\Http\Application($classLoader))->run();

00025: });

1 require("/var/www/html/typo3_src-8.7.10/typo3/sysext/backend/Resources/Private/Php/backend.php")

/var/www/html/typo3_src-8.7.10/typo3/index.php:

00001: <?php
00002:

00003: require DIR . '/sysext/backend/Resources/Private/Php/backend.php';

[schrej-zz]

I have the same issue.
No feedback for 6 month now?
Any hints?
Thanks

[schrej-zz]

I was able to figure out, what the issue is.
You just have to rename ext/yag/Configuration/TypoScript/Backend/setup.txt to "Setup.txt".
I think setup.txt should be the right name based on the nomenclature, but I was not able to figure out, where the reference to this file is in the code. So it's just a workaround.