Error Screen2 Error Screen1 while publishing app on web getting error called: check your log or contact the app auther.please find above image links
ERROR: An error has occurred. Check your logs or contact the app author for clarification.
if anyone can help me to resolve this error I'd be grateful.
There are multiple reasons for this error. Rstudio has provided multiple reasons (link below) but most common are:
Environment variables not the same in shiny web vs. local (make sure working directory is set to ~/, start a new rsession and run only the ui.R, server.R or app.R and see if you can preview in local before publishing.)
Update libraries to latest versions and hopefully you are not using the libraries that are not yet available in CRAN.
来源：https://stackoverflow.com/questions/47727806/error-an-error-has-occurred-check-your-logs-or-contact-the-app-author-for-clar