Smush request timed out


Wanted to smush images but keep getting this error:

Smush request timed out, You can try setting a higher value for WP_SMUSH_API_TIMEOUT

I did search before asking, and tried to increase the timeout timer in functions.php as suggested in previous tickets. This plugin worked fine in another site of ours just yesterday. So, we checked our server logs and seems it couldn’t connect to your smush server. A regular ping to your IP didn’t return, so I wonder if your servers are down?