Cannot display product catalog on frontend as admin.

Prereq.: Ibexa Content or Experience. Could not reproduce on Commerce edition.

Steps:

1. Go to frontend.
2. Load /product-catalog.
3. Observe that EZEE-3425 occurs.
4. Log in as admin.

Actual result: Error 500 occurs:

Call to a member function getViewType() on null

Remarks: On Comm edition EZEE-3434 occurs instead.