Unable to upload a file through ecommerce, but if i move the same menu to Webtools,Its working.

I am new to this forum, is it the right place to post ofbiz issue.
 
We need to upload a CSV format file as part of project requirement
We were able upload CSV format file under eCommerce in Version 16.11.07.
We are trying to implement the same in version 18.12.05 - here the same upload module does not work.
context.get("uploadedFile") - returns null;
Are we missing something?