When adding a question to the forum, you can only select Mendix versions 9.16.1 or lower.
The newer versions are not yet added to the dropdown.
Please add them to the list.
They should now be there;
Where can you find 9.17, 9.18 and 9.19?
It should show all available Mendix versions. See the screenshots below on where you can select them when posting inside the Mx Community;
Dropdown with Mendix versions