Ok, I'm totally at lost on WTH is wrong with ESO.
I have a PC with Windows 10 installed and at the beginning of this week I had crazy ping spikes when playing, latency will spike to 999+ at random time and the game becomes totally unplayable. Since the last two days I'm also having difficulity signing in, the server keeps giving me different error message. Sometimes I got error 300, next time it will be 201, 200, or 108. I've tried uninstalling my AV and firewall (Avast), reset my WiFi router, reset my cable modem, reset windows TCP/IP stack, etc. None works.
I also have a MacBook pro with ESO installation and it has the same problem as above, my internet connection is perfectly fine (I have a 30 Mbps connection) and I've contacted my ISP and they also confirmed that there's no problem or network maintenance from their side.
Any assistance to resolve my problem above is greatly appreciated.