the the formula separator is (;). The mistake indicates on AddColumns word and on"SortColumn"; word. Thank you for your help in advance.

With(
{
_Index:
LookUp(
colOrders_Indexed;
Address = ThisRecord.Address
).Index
},
AddColumns(
WebsiteOrders;
SortColumn;
LookUp(
colWaypointOrder_Indexed;
Index = _Index
).Value
)
)