Hi Harshal
Maybe this link can be helpful. I do have some of the problems as You, so i read some of the comments here with great interest.
Troubleshooting - User Interface Add-On for SAP NetWeaver - SAP Library
And try to ...
- Go to the page administration URL: https://<host>:<port>/sap/public/bc/ui2/page-administration/main.html
BR Michael