Error running examples

[rcnlee]

I get the following error when running the example ipynb. Any ideas? Thanks!

> @tree x^2 + y^2

! Emergency stop.
LabelledTree({7, 6} directed simple Int64 graph, Any[:+, :^, :x, 2, :^, :y, 2])
<everyjob> ...ring \\def\string \\encodingdefault{OT1}')end }
                                                  \let \f@encoding \encoding...
l.1 
  \documentclass[tikz]{standalone}
End of file on the terminal!

Here is how much of LuaTeX's memory you used:
 8 strings out of 494300
 100000,89155 words of node,token memory allocated 241 words of node memory still in use:
   1 dir, 34 glue_spec nodes
   avail lists: 2:12,3:1,4:1
 4357 multiletter control sequences out of 65536+600000
 14 fonts using 591799 bytes
 5i,0n,1p,61b,15s stack positions out of 5000i,500n,10000p,200000b,100000s
!  ==> Fatal error occurred, no output PDF file produced!

[dpsanders]

No idea... Did you follow the installation instructions?

[rcnlee]

Looks like my whole pgf/tikz system is not working. Thanks and I'll close this issue.