Fatal error: Uncaught Error: Class 'JsonSchema\Constraints\Constraint' not found in /home/mpolsk5/public_html/visibilityfuel.com/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/StringConstraint.php:20 Stack trace: #0 {main} thrown in /home/mpolsk5/public_html/visibilityfuel.com/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/StringConstraint.php on line 20