Why it's flagged. Some text is highlighted, often a note to yourself or an unfinished bit of editing. The build drops the highlight, and the highlighted words may be something you meant to change.
How serious. Worth a look.
How to fix it. In any editor:
- Read each highlighted passage and finish or delete it.
- Remove the highlight ("no color").
- Upload again.
When to leave it. If the highlight means nothing now, you can leave it. In the full report, correct as is stops it being flagged.