I also have this problem
Access Denied! Error 403
Browser's code signature verification failed. Filling and other features are disabled until this configuration issue is resolved. Please E-mail the diagnostics below to us at support@enpass.io.
Application
Name : Enpass Password Manager
Version : 5.3.0.1
Browser
Connecting Path : There were something wrong to find executable path.
Error : Unknown error
LocalAddress : 127.0.0.1
LocalPort : 10391
Origin : chrome-extension://kmcfomidfpdkfieipokbalgegidffkal
PeerAddress : 127.0.0.1
PeerPort : 49611
Operating System
Name : Windows 10
Proxy
Type : NoProxy