Hello! 
For a label, I was going to use “yellow,” but it is hard to read, so I switched it to a dark grey. Well, somehow, I switched the text to just dark grey, but the box/lines to yellow, which was actually nice because I could read the text, but still have the yellow box/lines. While everything exported fine, and I thought SAVED fine, but when I came back later, I have this error inside that label, but none of the others: “<span”. I CANNOT delete this label, its like forever on there. 
Thank you for any and all help!
Also, I’ll have three fretboards in one file, and all three have the labels underneath, but when I open the file back up, only the bottom/lowest fretboard has the labels. The labels disappear for the other two.