Fatal error: Uncaught Error: Using $this when not in object context in /home/mahmoud2025/public_html/vendor/consoletvs/charts/src/Templates/google/bar.multi.php:9 Stack trace: #0 {main} thrown in /home/mahmoud2025/public_html/vendor/consoletvs/charts/src/Templates/google/bar.multi.php on line 9