I have the solution as i got answer from their support team.

Pool1 is overloaded currently, so new pool has been deployed -> https://hxx-pool2.chainsilo.com if you had registration in pool1, we already transfered it to pool2 with your workers configuration.

Anyway the balance is not trasferred so i have no intention of starting all over again... Not happy, my coins are now stuck on a pool where i can't mine