Hi, I am having an issue with publishing one of my workbooks and I am getting the above error. There are 4 data files, all xlsx. I have not experienced this issue previously, and the 4 data files have not changed in any significant way. I can see that this issue has occurred for others in the community when using other data sources, but I have not seen this issue with excel files. Thanks!
Like any other software its just a bug that's acting up. Have you tried to creating an Extract to solve this? If not - remain the Excel files (.xlsx) and try adding as a fresh source then perform Replace Datasource and see if if resolves the issue.