File import is not working in BWC module

I am using sugar 8.0.1 

I am trying to import Opportunity through csv file

I have followed the below steps to import

1. Click on the  "Import Opportunities" option in dropdown

2. It directs me to the below page

3. I have upload a .csv file and click next. It will display an empty page

I have checked my error log and no errors are there related to this.

The interesting fact is that It's working fine in my dev and test environment

Kindly give your suggestion to resolve this.

Thanks in advance