Do you know why it has caused me to loose the connection? Guessing it shouldn’t have lost the connection what did the command I entered do?

Good afternoon I am in the final stages of building my 1000 x1000 screw and going through the “connecting, updating and configuring your workbee for the ozznest tutorial all was going well until step 5 after I edited the config.g file to M552 S2 and uploaded I lost my connection via the IP address and can’t get it back
Any help would be much appreciated
Dan