Export PDF and PGN of bar graphs don\'t work

[phavekes]

This issue is imported from pivotal - Originaly created at Nov 22, 2019 by Femke Morsch SURFnet

Period Year and Date 2019 > Group by Services > Hamburger menu > Download as PNG or PDF > Unexpected error.

Export line graphs works fine.

If it is too much work to fix this, please delete this option for bar graphs.