Uncaught TYPO3 Exception
#1: PHP Warning: count(): Parameter must be an array or an object that implements Countable in /var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/core/Classes/Database/PreparedStatement.php line 600 (More information)

TYPO3\CMS\Core\Error\Exception thrown in file
/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/core/Classes/Error/ErrorHandler.php in line 111.

10 TYPO3\CMS\Core\Error\ErrorHandler::handleError(2, "count(): Parameter must be an array or an object that implements Countable", "/var/www/vhosts/bueroring-online.de/httpdocs/typo3sysext/core/Classes/Database/PreparedStatement.php", 600, array)
9 count(NULL)

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/core/Classes/Database/PreparedStatement.php:
00598:     protected function convertNamedPlaceholdersToQuestionMarks(&$query, array &$parameterValues, array &$precompiledQueryParts)
00599:     {
00600:         $queryPartsCount = count($precompiledQueryParts['queryParts']);
00601:         $newParameterValues = [];
00602:         $hasNamedPlaceholders = false;

8 TYPO3\CMS\Core\Database\PreparedStatement::convertNamedPlaceholdersToQuestionMarks("SELECT * FROM fe_session_data WHERE hash = :hash", array, array)

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/core/Classes/Database/PreparedStatement.php:
00315:             $precompiledQueryParts = $this->precompiledQueryParts;
00316: 
00317:             $this->convertNamedPlaceholdersToQuestionMarks($query, $parameterValues, $precompiledQueryParts);
00318:             if (!empty($precompiledQueryParts)) {
00319:                 $query = implode('', $precompiledQueryParts['queryParts']);

7 TYPO3\CMS\Core\Database\PreparedStatement::execute(array)

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/frontend/Classes/Authentication/FrontendUserAuthentication.php:
00396:         if ($this->id && empty($this->sesData)) {
00397:             $statement = $this->db->prepare_SELECTquery('*', 'fe_session_data', 'hash = :hash');
00398:             $statement->execute([':hash' => $this->id]);
00399:             if (($sesDataRow = $statement->fetch()) !== false) {
00400:                 $this->sesData = unserialize($sesDataRow['content']);

6 TYPO3\CMS\Frontend\Authentication\FrontendUserAuthentication::fetchSessionData()

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/frontend/Classes/Controller/TypoScriptFrontendController.php:
01087:         $this->fe_user->unpack_uc('');
01088:         // Gets session data
01089:         $this->fe_user->fetchSessionData();
01090:         $recs = GeneralUtility::_GP('recs');
01091:         // If any record registration is submitted, register the record.

5 TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController::initFEuser()

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/frontend/Classes/Http/RequestHandler.php:
00116:         // Initializing the Frontend User
00117:         $this->timeTracker->push('Front End user initialized', '');
00118:         $this->controller->initFEuser();
00119:         $this->timeTracker->pull();
00120: 

4 TYPO3\CMS\Frontend\Http\RequestHandler::handleRequest(TYPO3\CMS\Core\Http\ServerRequest)

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/core/Classes/Core/Bootstrap.php:
00300: 
00301:         // Execute the command which returns a Response object or NULL
00302:         $this->response = $requestHandler->handleRequest($request);
00303:         return $this;
00304:     }

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

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/typo3/sysext/frontend/Classes/Http/Application.php:
00076:     public function run(callable $execute = null)
00077:     {
00078:         $this->bootstrap->handleRequest(\TYPO3\CMS\Core\Http\ServerRequestFactory::fromGlobals());
00079: 
00080:         if ($execute !== null) {

2 TYPO3\CMS\Frontend\Http\Application::run()

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/index.php:
00031: call_user_func(function () {
00032:     $classLoader = require rtrim(realpath(__DIR__ . '/typo3'), '\\/') . '/../vendor/autoload.php';
00033:     (new \TYPO3\CMS\Frontend\Http\Application($classLoader))->run();
00034: });

1 {closure}()

/var/www/vhosts/bueroring-online.de/httpdocs/typo3/index.php:
00032:     $classLoader = require rtrim(realpath(__DIR__ . '/typo3'), '\\/') . '/../vendor/autoload.php';
00033:     (new \TYPO3\CMS\Frontend\Http\Application($classLoader))->run();
00034: });