Unable to spawn instances. Ensure a large enough surface exists within the volume (UE 5.1)

Dear TERRAFORM TEAM

I have a problem when using Spawner on Ue5.1 when I press "Resimulate" button Birh_forest_Spawner and Pine_forest_Spawner don't work but error message "Unable to spawn instances. Ensure a large enough surface exists within the volume", even though i have followed all the steps in the video tutorial "https://youtu.be/sWWA1DWHm0k" but the above error still occurs for Birh_forest_Spawner and Pine_forest_Spawner and Meadow_rocks_Spawner no problem.
I don't know where this error comes from, please answer me and help me fix this error, I sincerely thank you.

Kind regard,
Portcoast