Tor Start Problem

I have using Tor for a while.It works fine for some days. Now my Tor browser opens just a blank page. If I type anythings in the url-bar, nothing is happening. I have changed the directory of installation, deleted extensions.json file nothing has worked.

If I tried for New-Identity, it displayed a message: TypeError: browser.webprogress is null

Trac:
Username: sagararla