I'm taking a course and using the Pentaho Data Integration software in version 8.1.0.0 and in the course I have to do a microsoft excel transformation, in which I select a file "customers.xlsx" that already has some data, made available in the course. I'll post a screenshot of the transformation settings below, and after clicking on the "!Sheet" tab and clicking on the "Get Sheetname(s)" button, an error window appears, which I'll post a screenshot of the detailed errors.
If anyone can help me with this, I need to continue the course and I'm stuck because of this error.
For now I haven't tried anything, I'm still researching, because I'm just starting out with the software, I'm doing a course at the moment, and I ended up falling into this error.