If the administrator account (which was originally created when initial setup wizard was run) has been deleted locally and another new administrator account was created, then it is not possible to create user via web. Only locally is possible, as the application is still looking for the original admin account.
This article provides an answer to the question: Can I restrict the live view or playback in VSC for certain cameras added in DIVAR hybrid 5000?
Yes, you can restrict the live view or playback for certain cameras added in DIVAR hybrid 5000 for an user who is using Video Security App.
If you have a DIVAR network/hybrid 2000/3000/5000 recorder and you want to connect and configure it, you can do it with the internet explorer compatibility mode in Microsoft Edge and you can use the system as before.