Go to next error not working?

Nope, nothing principal changed in this UI in 2.0.

Are there UI settings for errors?

Nope.

The problem I have is the alerts aren't working. In prior versions a syntax error was hard to mess. There were several visual aids; the red box in the upper right, which listed the errors, a red line in the right margin of the ide marking the location of the error - those are the ones I I miss the most.

Go to next error is working. But without the above alerts I sometimes miss simple syntax errors (like a missing comma or something). Now it's not a huge deal cause I catch them when I run the script. But it takes up more time.

What I'm asking, is there a way to bring them back. If they never left, then what area of the app should I be checking - what settings? Cause they clearly not working on my end.

"the red box in the upper right, which listed the errors, a red line in the right margin of the ide marking the location of the error"
was not changed, can't be switched off and should be inplace.

Can you please provide a screenshot of entire IDE window, with file having some errors open in editor?...

There 4 errors on this page. All syntax. This time the square is red. But notice there are no red lines to the right. I know it's not a big deal but it made it easy to find these errors. Since hovering over the red box tells me nothing but how many errors there are, I must go to the top of the file and press F2 over and over, until I find then all.

Like I said, I know it's a little thing. But I loved this little thing. ;)

Thanks for your help.

Maybe it is your color scheme? Can you please check the "Error Stripe Mark" values in "Settings | Editor | Colors & Fonts | General" for these style elements:
Error
Warning
Weak Warning

Also could you please try the default color scheme.

Ok got it. It was the error stripe mark was blank.

The settings have changed position since the last version. Thanks.