Hi,
Please ensure that your application has been installed to the correct folders.
There are some technical requirements and eligibility qualifications that a desktop app must meet in order to participate in the Windows 10 Desktop App Certification Program.
For detailed information, please refer to below.
Certification requirements for Windows Desktop Apps
https://learn.microsoft.com/en-us/windows/win32/win_cert/certification-requirements-for-windows-desktop-apps?redirectedfrom=MSDN
Also, please follow the instructions in below article to use Windows App Certification Kit.
Using the Windows App Certification Kit
https://learn.microsoft.com/en-us/windows/win32/win_cert/using-the-windows-app-certification-kit
Hope the information helps.
Thanks,
Eleven