DataProvider- validateCreateNewContact

[mbtionp2]

On TestUtil, I am getting error :

When I run the test:
Console shows:
SKIPPED: validateCreateNewContact
java.lang.RuntimeException: java.lang.Error: Unresolved compilation problems:
Type mismatch: cannot convert from org.apache.poi.ss.usermodel.Sheet to org.apache.poi.sl.usermodel.Sheet
The method getLastRowNum() is undefined for the type Sheet
The method getRow(int) is undefined for the type Sheet
The method getLastRowNum() is undefined for the type Sheet
The method getRow(int) is undefined for the type Sheet
The method getRow(int) is undefined for the type Sheet

Can you please help me fix it?