Hello @Lazerman,

Before we log in the management page of the CPE, please make sure that the PC has already set up the static IP address just like 192.168.0.x, you can refer to this article.

1. Please press the reset button on the back of the device for 5 seconds, and make sure light change into blinking. when the Power and LAN light is solid on, please tap in the "192.168.0.254" again.

2. If still cannot login, please use another browser, clear the browsing cash history.

3. Please turn off the firewall and the anti-virus application on the PC to have a try. If still cannot help, please use another cable connecting from the PC to the LAN port of the injector.

4. If all the advice cannot help to log in the interface, please do the "Ping Command", it is to test the connection between the PC to the CPE:
Press the "Windows" and the "R" on the keyboard at the same time, then you will see the "Run" coming out. Please tap in the "CMD" in the blank and then click "OK" you will see the black background. We need to tap in the "ping 192.168.0.254", then press enter, please tell us what you can see.
Here is the instruction.

5. If the result is "Request Time Out" or "Destination cannot be reached', please unplug all the cable on the CPE, then reset the device again. Leave it alone for 30 minutes, and then do the "Ping Command" again.

6. If possible, it is strongly recommended that you use another computer to have a try, which can succeed according to our experience.

You can also refer to this document to do more troubleshooting.