Hi E.DR_91,
The possible causes of web login failures are as follows:
No physical cables are routed between the PC and router.
The IP address is incorrectly configured.
The HTTPS service is disabled.
The web user account is not configured or the web user configurations are incorrect.
The access type of the web user is incorrect.
The number of online web users reaches the upper limit.
Access control is configured for web users on the device.
The interface for accessing the web platform is restricted.
The default port number is occupied by another program.
The browser configuration is incorrect.
For the step of troubleshooting, you can refer to
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100028615&id=EN-US_CONCEPT_0177895931&lang=enI hope it helps!