Hello, In order to fix this bug, you need to open the Enpass app, then you have to go to Enpass Menu -> Preferences and disable "Verify the browser" option. After this, the Opera extension should work well. (Tested with Opera 53.0 and Enpass from Mac App Store 5.6.9, macOS High Sierra 10.13.4, MacBook Air 2012)
Hello, I'm an happy Enpass user for a year and I use it on iPhone and Mac. I really like Chrome browser, but the Enpass autofill worked only on Safari and Firefox on iOS devices. I'm happy to know that now Chrome for iOS supports Enpass autofill!