If this is a "mac" issue, see this instruction (from another forum):
If you're seeing this error when launching WoWs: ‘The data obtained from the update service is incorrect.' (This is happening for first-time or fresh launch of WoWs), then you can try this workaround: -Go to Documents>World_of_Warships folder -Open WoWsLauncher.cfg in TextEdit -Go to line: <supported_chains>f0</supported_chains> -Change the f0 to f11. -Save the changes, then close that file. Then launch WoWS and that should get the updates going in the launcher. Let us know how that goes. If you haven't written in to ports@codeweavers.com, then you can do so and we'll append your ticket to the known bug and keep you updated to any progress made. We'll also send you any upcoming fixes when available.