Hi Ngoc,
It seems like this is a problem from the specific Studio Pro version 10.1.1, as seen here in this other question:
https://forum.mendix.com/link/space/app-development/questions/127722
There are two solutions suggested by Peter Tiszavolgyi in that forum question:
First solution:
- I opened a project which I created earlier (and used these modules) and updated to 10.1.1
- Exported the MxModelReflection, Excel Importer and Excel Exporter modul packages from this project
- Imported the module packages into the new project with the “Replacing Existing Module” option.
Second solution:
- Double-click on the reference selector that generates the error -> In the Properties window, click on the "Select" button of the “Go-to page”.
- Choose a different page. For example, the MxModelReflection.Microflow_View, then click OK on the Properties window.
- Re-do step 1, but now choose the MxModelReflection.MxObject_Details page.
- The parameter mapping will be reset, and the error will be gone.
I hope that helps you solve your problem, best regards!