Hi,
In general, I would suggest a factory reset and start over.
One hint: Once you set up the Shelly1 as "client" and select IP address, password (do not forget about gateway), you click "Save". The Shelly should restart itself and offer you to connect to it's new IP (a pop up window). Wait until this happens, do not disconnect, do not switch wifi networks.
Other things to consider:
- Is DHCP enabled on you router?
- Isn't there already the IP you are trying to set in your network? (if yes, the router will not connect it and it will wait until the device with the IP you want disconnects!)
- Are you sure the IP is in correct format (happened to me once, that I put a space in the IP by mistake)
- Check the password (obviously)
- Check if you see the device in the client list on your router Admin page.