Fix issue of undefined

[dependentmadani]

Problem:

An issue of reading undefined by toString.

Cause:

The issue occurs in nomalizeData function, when the data is not of type object, it gets an empty object.

Solution:

There are two solutions for this;

• If type of data is not object, it can be filled with default value, as newData.
• Check on data and data.level content before accessing the object. (This one was implemented)