While the list of contacts is added from Excel, Buffer SMS stops working. What to do?
I have installed the application on my phone (Xperia M2) and it works just fine. I created an Excel file in XLS format and it displays the fields normally. I advise creating a new XLS file. Then copy and paste the data. Make sure you don't have any unrecognizable characters or it will give you errors.
Additionally, yoy can reinstall the application from the Play Store: https://play.google.com/store/apps/details?id=com.buffersms&hl=en