Obviously you need to bring the block to the right side in order to win. So:
Level 45 Hint
Opening Extra Hint may just staight giving up the answer- Get below the block from the left side
Extra Hint
Use the left most and elevated ground (the cliff?, IDK what it's called)- Bring it above the mid part
Extra Hint
Use the mid part "hole"- Get the block over the pit. This probably obvious enough to do