Fatal error: Uncaught TypeError: array_shift(): Argument #1 ($array) must be of type array, null given in /home/clients/e91044d0153a826e26b16725d12aeabb/web/graph_rr.php:22 Stack trace: #0 /home/clients/e91044d0153a826e26b16725d12aeabb/web/graph_rr.php(22): array_shift(NULL) #1 {main} thrown in /home/clients/e91044d0153a826e26b16725d12aeabb/web/graph_rr.php on line 22