The following day, on April 18th those bitcoins together with the money that you received on April 9 (0.00231565 BTC) were moved from your onsite tockha wallet to address 1EryQJyJgUFJcXgk5gw7PZ9H34HiLi1R8r like HCP mentioned. Does the address 1EryQJyJgUFJcXgk5gw7PZ9H34HiLi1R8r belong to you?
If not, someone has moved your funds from your onsite wallet.
There are only 3 solutions:
1. You sent the bitcoins to address 1EryQJyJgUFJcXgk5gw7PZ9H34HiLi1R8r
2. Admin/owner of the tockha site stole your funds and moved them to the other address.
3. You have been hacked and a third party moved your funds to 1EryQJyJgUFJcXgk5gw7PZ9H34HiLi1R8r.
From what I can see on the block explorer the bitcoins are still on 1EryQJyJgUFJcXgk5gw7PZ9H34HiLi1R8r, a total of 0.01150947 BTC.