Saul has explained this to me once… Because your account is created locally, it is not possible for the remote (Node on top right) to know about your Public Key until you create a transaction, and so broadcast your public key. [EDIT: would be cool to read from the wallet file itself in the case where it has not been broadcast yet :)]
This is not a problem, your Public Key is usually not needed except when creating your first transaction. Most exchanges are asking to include a Message (which in turn is a unique key on their platform…), but for litebit.eu I’m really not sure as the message is not generated automatically:
seems they want you to input that message, so I’m not sure you should maybe ping their support to know if they mean to input a unique Message or if they mean to input your account’s public key.
hope you find your way in