I've restored my wallet from the seed but it's always blocked, from the beginning of the restorement.
How's it blocked? Do you get any kind of message stating that its blocked?
Is it possible to post a screenshot or two to help us understand how its blocked.
OP posted a screenshot on github. It turns out he is using a 2.1 version.
I do not remember how each old version behaves, and would be quite pointless to try to do so.
Thus, please update to the most recent version before you report a bug.