The following code block contains an error. It is intended to split the managerName column from DataFrame storesDF at the space character into two new columns (managerFirstName and managerLastName). Identify the error.

A sample of DataFrame storesDF is shown below:

storeId  open  openDate    managerName
0  true  1100746394  Vulputate Curabitur
1  true  944572255   Tempor Augue
2  false 925495628   Aliquam Et
3  true  1397353092  Faucibus Orci
4  true  986505057   Sed Fermentum

Code block:

storesDF.withColumn("managerFirstName", col("managerName").split(" ").getItem(0))
        .withColumn("managerLastName", col("managerName").split(" ").getItem(1))