R Shiny, disconnects from server - no new logs

My app runs fine locally but when deployed globally it immediately throws the "Disconnected from Server" error.

I believe this is related to loading a file:
D<-read.csv('/home/shiny/data.csv', stringsAsFactors = F)

I looked at my log files at /var/log/shiny-server/ but I do not see any new log to identify the problem.

Try setting

options(shiny.sanitize.errors = FALSE)

It sometimes shows errors in the browser console (F12 > Console).
Also browser's Network tab is usefeul for debugging: start recording, then refresh the page and look for statuses different from 200 OK.

Try to only use relative paths. Shiny applications and deployments work well when using relative paths.

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