Shiny app failing during long calculation - but fails early

I'm trying to troubleshoot settings on a shiny app that an external contractor set up, so I'm not super familiar with the actual code. I've noticed that the app runs without issue in R, but running from shinyapps.io is problematic.

I'm getting this error message:
image

And my settings in the app are, I thought, enough to manage long analysis times...


Hi Nova,

just a shot in the dark: Is the number of workers specified explicitly? E.g. plan(multiprocess, workers = 5).

Cheers

No, I've got:

plan(sequential)