Bug forum and text editor

Hi as I use this site I experience many problems 1) Scroll does not work in instruction screen.
2) forum link does not work.
3) the bug link does not work.

The only way I could acces this is by going to upper right corner and selecting forum.

One last thing I am typing in the correct answers and it do not run correctly. I get the code after errors it exactly the same as mine.

Please Help