Hello,
I'm using Apex 24.2 on a 21C database. I just noticed that an Interactive Report no longer downloads to Excel properly. I choose Actions / Download / Excel and it seems to execute fine. However, when I go to open up the .xlsx file, Excel gives the error: “Excel cannot open the file (my_filename).xlsx because file format or file extension is not valid”. The options for Download / csv, Download / HTML and Download / PDF all produce expected results. It's the Download / Excel that's giving the error. By the way, Excel opens the CSV file fine. I'm using Microsoft Office Professional Plus 2019. I use Excel extensively. This is the only error I get regarding Excel.
Thanks for looking at this.