PR# 19709 Pane with Selectors is missing

Problem Report Summary
Submitter: rwschlatter
Category: EiffelBuild
Priority: High
Date: 2021/01/27
Class: Bug
Severity: Critical
Number: 19709
Release: 20.11
Confidential: No
Status: Open
Environment: win 8.1 Pro
Synopsis: Pane with Selectors is missing

I open ESBUILDER.EXE and open an existing project.
The pane with Type Selector / Component Selector / Widget Selector does not show up.

Works fine in v19.12 and v20.05.

small test project files supplied, 
To Reproduce
as above
Problem Report Interactions
From:rwschlatter    Date:2021/01/27    Download   
Attachments for problem report #19709

Attachment: build_project.bpr     Size:923
Attachment: system_interface.xml     Size:8886