Baselinegrid is invisible. Also when visibility is 'on '. (Documentgrid visibility works fine).
The correct resolution for this issue has been resolved by a user.
Adobe InDesign team
Check in Preferences to see what the setting is for the Zoom. The default is 75% and can be changed.
Then try changing the default to whatever your Fit Spread in Window zoom is.
And also try zooming in and out to see if it appears.