This can be a shock when you enter a passphrase into the wallet and see a zero balance when there shouldn't be one. I've had it happen to me a number of times. It has always been a case of a typo in the passphrase, usually either an extra space at the end from doing a copy and paste or an incomplete selection of the text string from the copy and paste. Double click only selects characters up to the next common delimiter character, so ".", "@", "$", and other special characters can be easily left behind if they are the beginning or end of the passphrase when selecting it with double click.

Also check to see it the Lisk address with the 0 balance is the same as the one associated with your passphrase.