this url is only working if you’re on the machine running the webserver. devices within the same network should be able to access the CRM using your local ip, so e.g. http://192.168.0.15/suitecrm/. devices outside of your network need to use your external ip with proper port forwardings enabled first (if hosted on-premise).
You should keep in mind that your internal/external ip might change often. Internally, you can use a fixed IP instead, but you might need a DDNS service for permanent external access.
Thanks a lot for the useful answer! Unfortunately, I did something wrong because I wasn’t quite careful and my laptop got fried. Idk what happened; It’s a big hassle when it fails, and in that situation, you need the fortune to get it mended. I highly don’t recommend choosing the cheapest laptop. From my experience, I paid a high price to have the data recovered after a hard disk failure. I benefited from Salvage Data (salvagedata.com) services. If you’re looking to save money when buying a laptop, you might lose a lot more when you have to get it fixed. Think about that. Cheers!