When you found the NVR monitor showing an incorrect account name or password, you may follow the tips listed below to solve the problem.
Applies to: RLN8-410 (hardware version H3MB18/N2MB02/N3MB01/N7MB01), RLN16-410 (hardware version H3MB18/N6MB01), RLN36
Here is a video for your reference.
Login to the NVR and click Modify to input the correct password of the camera.
Login to the NVR and go to Settings > Channel page and click Modify to input the correct password of the camera.