download plot not working

[PK0207]

The download plot button seems to work but all plots it downloads are blank.

[PK0207]

Tried the method outlined here:
https://community.rstudio.com/t/problem-in-downloading-the-plot-with-downloadhandler-for-shiny-app/44876/2
But the plot no longer renders and the download is still blank.

[PK0207]

I thought I executed this in the first place but the download is still blank:
https://stackoverflow.com/questions/59714989/shiny-download-plot