User interface flashing and not working

I was able to log in, but when I got in the game, I noticed that the words, quest helper, maps, the chat box and other information were blank. Then it all started to flash off and on. One minute the UI is working fine, then a second later, it all disappears. I wonder if anyone else is having the same issue.

I tried it again and the text and the symbols/icons on the UI are not working still. Now I have even noticed thin vertical white lines popping up in the UI, and those to kinda flash in and out.

Anyone else having that issue?