Fatal error: Uncaught Error: Class 'ChrisKonnertz\StringCalc\Symbols\AbstractSymbol' not found in /var/www/drupal/sites/energiatalgud/vendor/chriskonnertz/string-calc/src/ChrisKonnertz/StringCalc/Symbols/AbstractOperator.php:12 Stack trace: #0 {main} thrown in /var/www/drupal/sites/energiatalgud/vendor/chriskonnertz/string-calc/src/ChrisKonnertz/StringCalc/Symbols/AbstractOperator.php on line 12