The Errors/Warnings section of the report lists all of the error, warning, and information messages generated by the fitter. By default, this section will display the number of each kind of message you have and the full text of the messages, but checkboxes at the top of the screen allow you to filter message details as you choose.
Checking all the boxes will give you a display like this:
Deselecting the Warning box in this particular example would result in this less detailed display: