I'm having the same symptoms as described above in using the Edge extension, on 2 different PC's. Enpass usually gives no response when clicked, and eventually shows the "connection error" screen. Sometimes (and I haven't deduced the pattern yet), it works normally!
Both PC's are set up as:
Windows 10 Pro: 1709 16299.19 (FCU)
Microsoft Edge: 41.16299.15.0
Enpass desktop app: 5.6.2 (Windows Store bridge app)
Enpass extension: 5.5.1
No Enpass 32-bit nor UWP app installed
The Chrome Enpass extension works perfectly, from the start, so I have that option. But I'm eager to try using Edge, and must have Enpass available to do that. Any ideas?
BTW, I'm a big fan of Enpass, and recommend it to everyone who asks. After years of using Lastpass, I find Enpass refreshing - works reliably on almost all platforms, has an intuitive interface, and is affordable. Thanks!