Steps: - Open studio in any list view - Try to add o2m to the list view - Select a related field - Click Search more - traceback "ViewClass is not defined" Since https://github.com/odoo/odoo/commit/186a8b31161fc8c75b346ff97f9403dca1ae677e#diff-5e3a43184a718068d966f2ea2eb972fb54b9795a8efa5c8e8cd99ab07a4e2cdfL19 the form, kanban and list view have been removed from the registry. opw-3020871 closes odoo/odoo#103980 X-original-commit: 19f98f7eb316a49a754eb68ea1352834a1e2a2e6 Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com> Signed-off-by: Achraf <abz@odoo.com>