Hello,
This issue might be due to missing a jar file org.apache.commons.io in your mendix application.
or
Your application might have a duplicate version of jar file in the lib folder. If you have a duplicate version of this jar file remove the oldest version and clean the deployment directory from studio pro and restart your app.
Hope it helps!
Please review the image and let me know. Thank you!
I have the same problem, missing the org.apache.commons.io from the Userlib directory. Is there a dependency that I am missing?
I feel that this problem was introduced somewhere in 10.6.x version. With 10.7.0 of ExcelImporter and 7.1.0 of MX Model Reflection as latest versions.
There is a new version of Excel Importer,10.7.0, but it did not fix the problem (for me)