I don't understand if it's me or Kraken, but whatever amount I'm trying to withdraw to another LTC address, I got the "invalid amount" error; whatever trade I'm trying to do (in this case selling some LTC), I got the "insufficient funds" error.
I'm tier 2 verified, so this shouldn't be a problem. Never made any operation except deposit some LTC. Can anyone explain me what I can actually do because I feel kinda stuck.
(I already opened a ticket...but don't really want to wait 5 weeks for an answer...

)
Do you have other pending orders to sell LTC? If so you cannot sell or withdraw any assets that you have sell orders for and would need to cancel those other orders before withdrawing or making new orders. If that's not the issue, then please post your ticket number.