After upgrading to 10.2 client (I am not 100% sure if that worked before upgrading or not. So, it may not be related to the upgrade), the LF client program in my local machine does not show PDF file inside the LF DocumentViewer, saying “Unable to display the electronic file type for this document”.
 
When I try to open PDF outside LF by choosing the context menu “Open -> View Electronic File”, it takes 35-40 seconds to open the PDF in Adobe Acrobat Reader DC (ver 2015.023.20056). When I open a PDF from Windows File Explorer it does not take that long, usually within 2-5 seconds.
This issue seems to be occurring only in my local machine. I tested in other Windows 7 machine and there was no such issue.

Thanks for any idea.