Yea I have made sure it was the right command, exactly as u posted only with my steamID. Yes it was in-game using console commands. I have even tried a fresh installation of the Arkapi and shop still same results.
I know this sounds stupid but it's a plug-in loaded try (cheat plugins.load ArkShop) I've had it happen once or twice where it doesn't load on Startup and then stays unloaded a good way to check to see if the mod is working is to use /shophelp in the chat window to see if you get a reply back