Hello @adeshewa
In order for you to be able to accept a shared item and be able to see what it is, you need to first log in via the LastPass extension, once you do that, the sharing keys will be created and thus you will be able to accept and see the item that was shared with you. Once the item has been shared with you, go to sharing center, accept the shared item and then go to "passwords" you will find the item there.
Please let us know if there is something else, we can do for you.
Greetings!
Heyner | Customer Care