Spine Ver :3.8.99 pro
Spine SDK :spine-unity-3.8-2020-11-20
Unity Ver :2019.4.15f1
I can import and play normally,
but as long as I click on the Spine file,
my unity will be stuck and cannot be moved.
If I delete the Spine file, everything will be normal.
It looked like it was caught in an infinite loop.
I found the old version of SpineSDK and installed it.
I solved the problem.