If you are using spconv < 2.0.2, update after spconv 2.0.2 build success or check [this issue](https://github.com/traveller59/spconv/issues/340#issuecomment-951493008) to fix a serious bug, I'm so sorry for this stupid bug.
[Spconv 1.x code](https://github.com/traveller59/spconv/tree/v1.2.1). We won't provide any support for spconv 1.x since it's deprecated. use spconv 2.x if possible.