Hi @Anshu kumar I've just faced the same issue with a fresh Enpass install (with setup downloaded today), Opera 42.0.2393.94 and extension v5.3.3.
You can test with this well known URL : https://discussion.enpass.io/index.php?/register/ :-)
@Hemant Kumar thanks for the tips of the generator history but it's not really intuitive for users coming from LastPass :-( Maybe a special category displaying the same history available directly from the Enpass interface would be very usefull !