Ouch ... this morning checking PI3 I found installed new Iot 14376 build.
I see that web management interface doesn't work correctly anymore ... processes, perfomance and app panels don't show infos anymore ...
Is it just my problem ?
I've had issues with these tabs not loading any data. They only worked during the small timeframe where I updated my workstation from Windows 7 to Windows 10, mostly because I no longer had my company's security software. As soon as the sysadmins installed the W10 version, I no longer had pretty graphs ! I haven't gotten them to add a specific rule for my raspberry yet.
If you're using personal equipment, you could try disabling your antivirus/adblock/... and test it again.
It would be nice if we had the choice as to whether to install the new build 14376. The one feature I despise in Win10 IoT Core (-Pro) is these automatic updates which cannot be blocked.
I kept a copy of build 14342, but I have to burn a new SD card every day or so because it wants to auto-update to the broken 14376. Microsoft can't seriously think they can auto-update embedded application devices -- especially when this Insider Preview process already shows such updates result in major breakage of previously working features.