GZDoom Builder Error :SpawnPolyobj: Poly 180 does not exist

[Nautkillius]

Hello! I  recently use GZDoom Builder, and I am trying to make a swinging door, and every time i am testing I get this error: SpawnPolyobj: Poly 180 does not exist.Is  this a bug, or am I doing something wrong? I follow every step from this tutorial and still does not work :

 

[scifista42]

Did you set both the anchor's and spawn spot's angle to 1?

[Nautkillius]

Thank you soo much!