Comment 9 for bug 1651815

It appears that the blank pages are triggered by (regular text) tspan 'y' values like:

  <tspan y="NaN" x="10">Conclusion</tspan>

Deleting all four 'y="NaN"' or restoring the old values prior to r15302 in tutorial-advanced.svg makes the content rendered visibly again (but with a partially messed-up layout).

Oddly, other strange and seemingly invalid attribute values for rect 'y' don't seem to bother Inkscape ('0INVALID' ?) - they do not seem to affect whether or not any content is rendered visibly at all:

 <rect id="d0e694" display="none" height="1e3px" width="288" y="0INVALID" x="10"/>

These occur with rectangles which are linked via <use> into <flowRegion/> elements.

For details, see e.g. the diff here:
https://bazaar.launchpad.net/~inkscape.dev/inkscape/0.92.x/revision/15302/share/tutorials/tutorial-advanced.svg#share/tutorials/tutorial-advanced.svg