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I seem to have trouble with this file and get the following error: "ERROR: Could not load the spreadsheet data.", see screenshot.

I've triple checked the formatting and have done it in the same way for other files too, but can't seem to figure out the issue here. Does anyone know what it could be? Thanks.

Status change: In Progress → Completed

I've managed to work this out. The Excel file must have been corrupted somehow, because I tried everything by process of elimination. In the end, I started with a new ODS sample file and copied the info in there, uploaded it and it worked right away 🙌