Hey Dmytro,
This is issue is most likely due to the local network firewall rule preventing any outgoing traffic to translation API endpoint.
If the ping is successful --> no firewall issue
If the ping is unsucessful --> firewall issue
If the ping is successful and the full request is NOT --> you probably don´t have the correct credentials set-up.
Can you share with us the full response? The error message usually provides sufficient hints.
Thanks