Leet code run time error

Leet code is throwing me run time error .


How do i fix it ?

post your code, instead of a screenshot, it is much easier to debug

Please post entire code, cannot debug with this

let addTwoNumbers=function (l1,l2){

   let dummyHead= new ListNode(0) , node=dummyHead;
   let carry= 0,a,b,c,value;
   
   while (l1 !==null || l2 !==null){
   a= (l1===null) ? 0 :l1.val;
   b= (l2===null) ? 0 :l2.val;
   c=a+b+carry;
   val=c%10;
   carry=Math.floor(c/10);
   node.next=new Listnode(val);
   node=node.next;
   if(l1 !==null) l1=l1.next;
   if(l2!==null) l2=l2.next;
   }
   if (carry !==0){
     node.next= new ListNode (carry);
   }
   return dummyHead.next;

}

let addTwoNumbers=function (l1,l2){

   let dummyHead= new ListNode(0) , node=dummyHead;
   let carry= 0,a,b,c,value;
   
   while (l1 !==null || l2 !==null){
   a= (l1===null) ? 0 :l1.val;
   b= (l2===null) ? 0 :l2.val;
   c=a+b+carry;
   val=c%10;
   carry=Math.floor(c/10);
   node.next=new Listnode(val);
   node=node.next;
   if(l1 !==null) l1=l1.next;
   if(l2!==null) l2=l2.next;
   }
   if (carry !==0){
     node.next= new ListNode (carry);
   }
   return dummyHead.next;

}
Here is the code