# When i try starting a session it says it found disallowed object type, any ideas? **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** unreal-editor-for-fortnite, fortnite\ **Created:** [March 23, 2023, 4:01am UTC](https://forums.unrealengine.com/t/when-i-try-starting-a-session-it-says-it-found-disallowed-object-type-any-ideas/805817 "2023-03-23T04:01:07Z")\ **Posts on this page:** 1\ **Showing post:** 49
**Author:** ![HalcyonKnight96](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/halcyonknight96/32/924312_2.png) [@HalcyonKnight96](https://forums.unrealengine.com/u/HalcyonKnight96)\ **Post date:** [April 3, 2023, 1:54pm UTC](https://forums.unrealengine.com/t/when-i-try-starting-a-session-it-says-it-found-disallowed-object-type-any-ideas/805817/49 "2023-04-03T13:54:55Z")
Hi @viyo1708 > [@When importing buildings directly from fortnite in flying man mode the project does not pass validation and does not start giving error messages](https://forums.unrealengine.com/t/when-importing-buildings-directly-from-fortnite-in-flying-man-mode-the-project-does-not-pass-validation-and-does-not-start-giving-error-messages/832301/12): > > For anyone else that sees this thread with Validation errors related to Physics Materials: The issue stems from placing assets in Live Edit rather than UEFN. If you place an asset with foliage or some cloth related asset in Live Edit and then exit Live Edit you might hit this issue. My repro steps were: Open Project Launch Live-Edit Add any prefab that has an asset that references a Physics Material Logout of Live Edit (Close Fortnite client) Try to launch session in UEFN again Hit validatio… --- _[View the full topic](https://forums.unrealengine.com/t/when-i-try-starting-a-session-it-says-it-found-disallowed-object-type-any-ideas/805817)._