Compile suddenly is failing

This message:
Check that you have selected at least one document from the ‘Contents’ pane that contains text, also check you have valid items selected in the ‘Formatting’ pane.

I have a content selected in hte binder and as a selection (blue format) selection

It keeps telling me it’s empty but I can select and copy text???

Make sure that you’ve used a Section Layout that captures some content from the selected item. (Text, Title, Notes, something.)