fixed crash switching to tree view in pres

1 files changed, 1 insertions, 1 deletions

diff --git a/src/client/views/nodes/trails/PresBox.tsx b/src/client/views/nodes/trails/PresBox.tsx
index 68634076d..e0de8e1fd 100644
--- a/src/client/views/nodes/trails/PresBox.tsx
+++ b/src/client/views/nodes/trails/PresBox.tsx
@@ -1806,7 +1806,7 @@ export class PresBox extends ViewBoxBaseComponent<FieldViewProps>() {
     @computed get transitionDropdown() {
         const { activeItem } = this;
         // Retrieving spring timing properties
-        const timing = StrCast(activeItem.presentation_effectTiming);
+        const timing = StrCast(activeItem?.presentation_effectTiming);
         let timingConfig: SpringSettings | undefined;
         if (timing) {
             timingConfig = JSON.parse(timing);