Bug? Asset Checkout App Showing Empty Table

[memsim1010]

I created a new app from the Asset Checkout sample.  I spent hours customizing it and it was working like a dream on Friday.  This morning, however, I opened it and the products table is showing as empty.  I checked my data source (Excel file in my OneDrive for Business and confirmed the data is there. 

I have tried:

1. Restoring a previous version of my app
2. Adding a new gallery with no filters to see if I can see the data
3. Creating a collection from my data to see if I could see the first 5 rows under File > Collections
4. Recreating the App
5. Creating a new Excel file and manually copying & pasting the data
6. Removing my datasource and adding it again.
7. A different browser

[memsim1010 · Accepted solution]

Disregard!  I had added a formula to my Excel which is not supported.  I removed the formula and it now shows all my data.