Q: Why it keep prompting 'please relogin after install plugin' while I have installed the plugin already?

A: To make the plugin work, we need allow it to run when log-in the camera.
There are steps below for how to allow the plugin to run on the browser.

1) For Firefox, please go to Settings-->Add Ons-->Plugins. Find npIPCReg DLL to choose Always Active.

2) For Safari, please go to Security-->Internet Plug-ins and check Allow Plugin-ins.

3) For IE, please go to Tool-->Internet Option-->Security-->Custom Level-->ActiveX control and Plug-ins. Please check to enable below options:

Enable: Download unsigned ActiveX controls
Enable: Initialize and script ActiveX controls not marked as safe
Enable: Run ActiveX controls and plug-ins

After configuring to all the plugin run, then restart the browser to log-in camera on web page and the plugin will be auto loaded and run on the browser.