At what point in the process do I type those commands? When I open Putty and type enable, it gives me an error message that says "unknown command" and ignores the command itself. Is there a different set of instructions for where to enter these commands?
Could you please try to run the same commands and check from the console access of the Switch as described below?
By Console access: If access via IP address is not possible here is a guide on how to access to the Switch via console (cable access between your PC to the ICX 7150-C12P) in this case we need a USB type C to USB standard or Console cable Rj45 to USB.