App is crashing because of android.os.FileUriExposedException

The app is crashing when I'm trying to open a file. I found the log

android.os.FileUriExposedException: file:///storage/emulated/0/test.txt exposed beyond app through Intent.getData()

I know the solution of this problem. I fixed in the newer version of the app. For new version of app, I used FileProvider for apk installation, but old version of app use Uri.fromFile(dest).

Now the problem is the auto update of the app. I need to update app automatically from the old version of the app. When I tried to update new app it donload the app, but when try to install app it is crashing. Is there any way to install app from the old version of app?

NB: previous developer didn’t use play store for our app.

Thanks in advance