Deprecated: assert(): Calling assert() with a string argument is deprecated in /homepages/27/d515213933/htdocs/sites_cms/gamerologizm_1and1_drupal8/core/lib/Drupal/Core/Cache/DatabaseBackend.php on line 197

Deprecated: assert(): Calling assert() with a string argument is deprecated in /homepages/27/d515213933/htdocs/sites_cms/gamerologizm_1and1_drupal8/core/lib/Drupal/Core/Cache/DatabaseBackend.php on line 197
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RuntimeException: Failed to start the session because headers have already been sent by "/homepages/27/d515213933/htdocs/sites_cms/gamerologizm_1and1_drupal8/core/lib/Drupal/Core/Cache/DatabaseBackend.php" at line 197. in Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() (line 140 of vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php).