What can I do if the pool I delegated to became inactive during a staking epoch?

Once the current staking epoch finishes, you can claim your reward and withdraw your staked amount (or move the stake to another validator pool). It is not possible to withdraw ETL immediately if a pool becomes inactive during a staking epoch. You must wait until a new epoch starts to move or withdraw your stake. If the claim button is grey in color, it indicates no claim available from that pool.