Pandas DataFrame Constructor Error: 'DataFrame constructor not properly called!'

This error occurs because the DataFrame constructor in pandas is not properly called. It could be due to passing the wrong type of data to the constructor or passing incorrect parameters.

In the specific code snippet provided, the error could be due to passing a string to the DataFrame constructor instead of a list or dictionary. To resolve this issue, the data should be converted to the appropriate data type before passing it to the constructor.

For example, if the data is in JSON format, it can be converted to a dictionary using the 'json.loads()' method and then passed to the DataFrame constructor. Alternatively, if the data is in a CSV file, it can be read using the 'pd.read_csv()' method, which returns a DataFrame object.

Overall, it is important to ensure that the DataFrame constructor is called with the correct parameters and the appropriate data type to avoid this error.