"Correction" dictionary not found

Good afternoon,
I’ve always used srivener in the last months and when I’ve first used it, I selected the language both in the “general setting” (and that’s ok) and in the “correction” section in order to have a correct use of spell check.

Well, the problem is that this morning I’ve noticed that the spell check doesn’t work and I think it is due to the fact that the dictionary is not found. Infact, the avalaible dictionaries list is empty even if I dowload a dictionary or I insert it manually. This is awful for me beacuse I can’t see if I mistake when I’m typing.

Can you suggest me some action to try in order to fix this problem? I’m quite sure it is something like a bug.

Thank you, I’m looking forward your reply.