There is really no reason to even use this extension, WOT is based on users and is better…
But to troubleshoot go type about:addons in to the address bar and go to Avast! WebRep. Enable it if it is disabled. Check for updates. If it is still not working, disable it again and find some other kind:
- WOT- WebRep with a larger community
- Adguard Adblocker- Ad Blocker with Malicious and Phishing Website Block
- Do Not Track Me- An Anti-Track extension
WebRep has never (yes never) blocked any access while WOT has saved me from a malicious site already. WOT marked a real malicious site red while WebRep marked it green!