Issue: User can't post new template

Admin user tried to post new template.

Fatal Error: attempted to instantiate non-existent class vw_UI_Tab_Template_Model
[path]/vault/core/model/ui/tab/template/vw.php does not exist or does not contain the specified class.

#0: vw_Hard_Core::fetch_object() in [path]/vault/core/model/vw.php at line 697
#1: vw_Hard_Core::model() in [path]/vault/core/controller/ui/create/vw.php at line 189
#2: vw_UI_Create_Controller->can_create() in [path]/vault/core/controller/ui/create/vw.php at line 165
#3: vw_UI_Create_Controller->get_default_area() in [path]/vault/core/controller/ui/create/vw.php at line 99
#4: vw_UI_Create_Controller->create() in [path]/vault/core/controller/ui/index/vw.php at line 59
#5: vw_UI_Index_Controller->create() in [path]/vault/core/controller/ui/index/vw.php at line 39
#6: vw_UI_Index_Controller->execute() in [path]/vault/core/controller/ui/stack/vw.php at line 276
#7: vw_UI_Stack_Controller->execute() in [path]/library/vw/XenForo/ControllerPublic/Wiki.php at line 70
#8: vw_XenForo_ControllerPublic_Wiki->actionIndex() in [path]/library/XenForo/FrontController.php at line 369
#9: XenForo_FrontController->dispatch() in [path]/library/XenForo/FrontController.php at line 152
#10: XenForo_FrontController->run() in [path]/index.php at line 13



When I try to reproduce this I am presented with:

Please correct the following errors:
vw_invalid_page

And see nothing in the admin logs. They cannot be previewed either.