“There are some clips which are not included inside CD tracks. This is not allowed when burning CDs (unless the Audio in pauses mode is activated).”
ok, so how do I fix this? I want to burn a CD. I don’t know what this means. Talk to me like I am 6.
You could simply use the CD Wizard to regenerate your markers; assuming you’re 6 
Else, you need to zoom at the clip boundaries and make sure the CD markers are in the empty space, not crossing the clip.
thanks. I ended up deleting the file and reloading it. I am in 8. I tried to use “audio in pause mode” or whatever and it wasn’t having it either. It’s working now.
PS: today was the first time I ever actually opened WaveLab. It took a lot of learning, but it works pretty good so far.