Shiny fileInput Issue

After a CSV file is loaded into shiny app it closes the browser. No messages deisplayed

I have tested this in Chrome Version 75.0.3770.90, Edge and Firefox 70.0.1. This code use to work before. I am using R 3.6.1 and R Studio 1.2.5001

fileInput("i_file", "Please Upload CSV file :",
          accept = c("text/csv",
                     "text/comma-separated-values,text/plain",
                     ".csv"))

After I select the file, browser closes immediately. Pls help to identify the issue and suggest solution/workaround.

Selecting the file and Uploading it should show 1st row in CSV as values in a dropdown in the app. And display graphs for the selected values