For some reason I failed to find this report and created duplicate as mentioned above by Ren. I don't know how it worked in previous versions of Minecraft but it seems to me that "geteduclientinfo" command is missing. The command supposed to be part of "Education Edition" only (see https://minecraft.gamepedia.com/Commands/geteduclientinfo). So it's either Code Connection is treating Win10 version as Education Edition (and it shouldn't) or the latest Win10 version is missing a command.
For some reason I failed to find this report and created duplicate as mentioned above by Ren. I don't know how it worked in previous versions of Minecraft but it seems to me that "geteduclientinfo" command is missing. The command supposed to be part of "Education Edition" only (see https://minecraft.gamepedia.com/Commands/geteduclientinfo). So it's either Code Connection is treating Win10 version as Education Edition (and it shouldn't) or the latest Win10 version is missing a command.