Hi @Anonymous
You have to do like thie before reading excel file using launch excel

1. List all files in sharepoint folder using list folder action specifying folder
2. The output of the above action is list of files sorted by last modified dates (oldest to recent one).
3. So i used reverse list to reverse the list and got the recent one at first
4. Use get file content using path and then passed the below arguments

The output of this is a binary data which need to convert to file using convert binary to file action thus converting the file data to excel file. Once it is converted, we can use launch excel to laucnh the excel and do subsequent operations.
Hope it helps 🙂
Mark it as solution if it resolves your query 🙂