Warning: Undefined global variable $_SESSION in /home/.sites/121/site1221/web/headline/zeileB/einblendung_warenkorb.php on line 2

Warning: Trying to access array offset on null in /home/.sites/121/site1221/web/headline/zeileB/einblendung_warenkorb.php on line 2

Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /home/.sites/121/site1221/web/headline/zeileB/einblendung_warenkorb.php:2
Stack trace:
#0 {main}
  thrown in /home/.sites/121/site1221/web/headline/zeileB/einblendung_warenkorb.php on line 2