Fatal error: Uncaught Error: Class 'ChrisKonnertz\StringCalc\Symbols\AbstractFunction' not found in /var/www/drupal/sites/energiatalgud/vendor/chriskonnertz/string-calc/src/ChrisKonnertz/StringCalc/Symbols/Concrete/Functions/AbsFunction.php:13 Stack trace: #0 {main} thrown in /var/www/drupal/sites/energiatalgud/vendor/chriskonnertz/string-calc/src/ChrisKonnertz/StringCalc/Symbols/Concrete/Functions/AbsFunction.php on line 13