Every time I mark the four corners of the first side, it says "[find_transform-2] process has died"

[JianzhongLEE]

Hello, why do I report an error every time I mark the four corners of the first side

[JianzhongLEE]

This error has nothing to do with Chinese characters. It was reported before I added some cout

[JianzhongLEE]

Here is the picture captured just before it reported errors

[rrkini]

Hi @JianzhongLEE were you able to find the cause for this error?

[stanny880913]

Hi, may I ask how to click the corners? I press left key and space , these is nothing happen in polygon!