General Questions/New to Joomla! 5.x • Re: 500 Internal Server Error out of the blue

Code:

Joomla\CMS\WebAsset\Exception\UnsatisfiedDependencyExceptionin /home/artglass/public_html/libraries/src/WebAsset/WebAssetManager.php (line 385)            $depType = $depType ?: 'preset';            // Make sure dependency exists            if (!$this->registry->exists($depType, $depName)) {                throw new UnsatisfiedDependencyException(                    sprintf('Unsatisfied dependency "%s" for an asset "%s" of type "%s"', $dependency, $name, 'preset')                );            }            $this->useAsset($depType, $depName);WebAssetManager->usePresetItems('template.atum.base')in /home/artglass/public_html/libraries/src/WebAsset/WebAssetManager.php (line 282)WebAssetManager->useAsset('preset', 'template.atum.base')in /home/artglass/public_html/libraries/src/WebAsset/WebAssetManager.php (line 390)WebAssetManager->usePresetItems('template.atum.ltr')in /home/artglass/public_html/libraries/src/WebAsset/WebAssetManager.php (line 282)WebAssetManager->useAsset('preset', 'template.atum.ltr')in /home/artglass/public_html/libraries/src/WebAsset/WebAssetManager.php (line 208)WebAssetManager->__call('usepreset', array('template.atum.ltr'))in /home/artglass/public_html/administrator/templates/atum/error_login.php (line 65)require('/home/artglass/public_html/administrator/templates/atum/error_login.php')in /home/artglass/public_html/administrator/templates/atum/error.php (line 21)require('/home/artglass/public_html/administrator/templates/atum/error.php')in /home/artglass/public_html/libraries/src/Document/HtmlDocument.php (line 731)HtmlDocument->_loadTemplate('/home/artglass/public_html/administrator/templates/atum', 'error.php')in /home/artglass/public_html/libraries/src/Document/HtmlDocument.php (line 785)HtmlDocument->_fetchTemplate(array('template' => 'atum', 'directory' => '/home/artglass/public_html/administrator/templates', 'debug' => 'maximum', 'csp_nonce' => 'N2RiNjczNDk3YTkwNzMyN2YyYzE2ZmVkN2FjOTU1ZGQ0MzdlZDEzZDU4MGM3NTU3N2E1OTZkNjEyYjFhZGE2NjZlNDViN2YzNGM4NjEzZDFhNDJmZTIxZWEwMDVkNjMyYzkwMDA1NzUzYjBiZDBjMTY1YTkxNjFmMmNlNDM3YTA=', 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))in /home/artglass/public_html/libraries/src/Document/HtmlDocument.php (line 622)HtmlDocument->parse(array('template' => 'atum', 'directory' => '/home/artglass/public_html/administrator/templates', 'debug' => 'maximum', 'csp_nonce' => 'N2RiNjczNDk3YTkwNzMyN2YyYzE2ZmVkN2FjOTU1ZGQ0MzdlZDEzZDU4MGM3NTU3N2E1OTZkNjEyYjFhZGE2NjZlNDViN2YzNGM4NjEzZDFhNDJmZTIxZWEwMDVkNjMyYzkwMDA1NzUzYjBiZDBjMTY1YTkxNjFmMmNlNDM3YTA=', 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))in /home/artglass/public_html/libraries/src/Document/HtmlDocument.php (line 640)HtmlDocument->render(false, array('template' => 'atum', 'directory' => '/home/artglass/public_html/administrator/templates', 'debug' => 'maximum', 'csp_nonce' => 'N2RiNjczNDk3YTkwNzMyN2YyYzE2ZmVkN2FjOTU1ZGQ0MzdlZDEzZDU4MGM3NTU3N2E1OTZkNjEyYjFhZGE2NjZlNDViN2YzNGM4NjEzZDFhNDJmZTIxZWEwMDVkNjMyYzkwMDA1NzUzYjBiZDBjMTY1YTkxNjFmMmNlNDM3YTA=', 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))in /home/artglass/public_html/libraries/src/Document/ErrorDocument.php (line 139)ErrorDocument->render(false, array('template' => 'atum', 'directory' => '/home/artglass/public_html/administrator/templates', 'debug' => 'maximum', 'csp_nonce' => 'N2RiNjczNDk3YTkwNzMyN2YyYzE2ZmVkN2FjOTU1ZGQ0MzdlZDEzZDU4MGM3NTU3N2E1OTZkNjEyYjFhZGE2NjZlNDViN2YzNGM4NjEzZDFhNDJmZTIxZWEwMDVkNjMyYzkwMDA1NzUzYjBiZDBjMTY1YTkxNjFmMmNlNDM3YTA=', 'templateInherits' => '', 'params' => object(Registry), 'file' => 'error.php'))in /home/artglass/public_html/libraries/src/Error/Renderer/HtmlRenderer.php (line 70)HtmlRenderer->render(object(RuntimeException))in /home/artglass/public_html/libraries/src/Exception/ExceptionHandler.php (line 136)ExceptionHandler::render(object(RuntimeException))in /home/artglass/public_html/libraries/src/Exception/ExceptionHandler.php (line 73)ExceptionHandler::handleException(object(RuntimeException))in /home/artglass/public_html/libraries/src/Application/CMSApplication.php (line 336)CMSApplication->execute()in /home/artglass/public_html/administrator/includes/app.php (line 58)require_once('/home/artglass/public_html/administrator/includes/app.php')in /home/artglass/public_html/administrator/index.php (line 32)RuntimeExceptionAsset registry file "media/system/joomla.asset.json" contains invalid JSONin /home/artglass/public_html/libraries/src/WebAsset/WebAssetRegistry.php (line 377)    {        $data = file_get_contents(JPATH_ROOT . '/' . $path);        $data = $data ? json_decode($data, true) : null;        if ($data === null) {            throw new \RuntimeException(sprintf('Asset registry file "%s" contains invalid JSON', $path));        }        // Check if asset field exists and contains data. If it doesn't - we can just bail here.        if (empty($data['assets'])) {            return;WebAssetRegistry->parseRegistryFile('media/system/joomla.asset.json')in /home/artglass/public_html/libraries/src/WebAsset/WebAssetRegistry.php (line 352)WebAssetRegistry->parseRegistryFiles()in /home/artglass/public_html/libraries/src/WebAsset/WebAssetRegistry.php (line 132)WebAssetRegistry->get('script', 'keepalive')in /home/artglass/public_html/libraries/src/WebAsset/WebAssetManager.php (line 274)WebAssetManager->useAsset('script', 'keepalive')in /home/artglass/public_html/libraries/src/WebAsset/WebAssetManager.php (line 208)WebAssetManager->__call('usescript', array('keepalive'))in /home/artglass/public_html/administrator/modules/mod_login/tmpl/default.php (line 19)require('/home/artglass/public_html/administrator/modules/mod_login/tmpl/default.php')in /home/artglass/public_html/libraries/src/Dispatcher/AbstractModuleDispatcher.php (line 87)AbstractModuleDispatcher::Joomla\CMS\Dispatcher\{closure}(null)in /home/artglass/public_html/libraries/src/Dispatcher/AbstractModuleDispatcher.php (line 90)AbstractModuleDispatcher->dispatch()in /home/artglass/public_html/libraries/src/Helper/ModuleHelper.php (line 291)ModuleHelper::renderRawModule(object(stdClass), object(Registry), array('id' => 'section-box'))in /home/artglass/public_html/libraries/src/Helper/ModuleHelper.php (line 162)ModuleHelper::renderModule(object(stdClass), array('id' => 'section-box'))in /home/artglass/public_html/administrator/components/com_login/tmpl/login/default.php (line 21)include('/home/artglass/public_html/administrator/components/com_login/tmpl/login/default.php')in /home/artglass/public_html/libraries/src/MVC/View/HtmlView.php (line 416)HtmlView->loadTemplate(null)in /home/artglass/public_html/libraries/src/MVC/View/HtmlView.php (line 204)HtmlView->display()in /home/artglass/public_html/libraries/src/MVC/Controller/BaseController.php (line 697)BaseController->display()in /home/artglass/public_html/administrator/components/com_login/src/Controller/DisplayController.php (line 64)DisplayController->display()in /home/artglass/public_html/libraries/src/MVC/Controller/BaseController.php (line 730)BaseController->execute('')in /home/artglass/public_html/libraries/src/Dispatcher/ComponentDispatcher.php (line 143)ComponentDispatcher->dispatch()in /home/artglass/public_html/administrator/components/com_login/src/Dispatcher/Dispatcher.php (line 45)Dispatcher->dispatch()in /home/artglass/public_html/libraries/src/Component/ComponentHelper.php (line 361)ComponentHelper::renderComponent('com_login')in /home/artglass/public_html/libraries/src/Application/AdministratorApplication.php (line 150)AdministratorApplication->dispatch()in /home/artglass/public_html/libraries/src/Application/AdministratorApplication.php (line 195)AdministratorApplication->doExecute()in /home/artglass/public_html/libraries/src/Application/CMSApplication.php (line 306)CMSApplication->execute()in /home/artglass/public_html/administrator/includes/app.php (line 58)require_once('/home/artglass/public_html/administrator/includes/app.php')in /home/artglass/public_html/administrator/index.php (line 32)