By default it redirects error messages to the chat and you can call a window that shows them where you can copy them to clipboard from.
But you could even supress those (but I would not advise it).
I also make extensive use of the "Pre-Init" debug option for my addons.
If you think anything I or somebody else said violates the Rules of this Forum, you are free to flag my posts. Till I get any notifcaion from this, I just asume you know you have no case against me or Zenimax disagrees with you.
The UI error boxes are annoying and useless to me I would like an addon to eliminate these so they no longer pop up.
I think I have to disagree. If they are useless to you then before you even think about using addons you probably need to go educate yourself enough so that they aren't. At the very least learn to understand them enough so you can determine from the error which add-on you have is causing the problem so that you can disable it.
If you simply supress them, you'll just be right back here wondering why your game is so mesed up.