win 64 slicer version 4.11 2021.0226
It appears the developers of that extension never finished Python 3 compatibility of that extension. SliceTracker module cannot be loaded on Slicer 4.11.20200930
They have a work in progress branch that needs finalizing GitHub - DeepInfer/Slicer-DeepInfer at python3
@mehrtash It appears you started a branch to resolve python3 issues. Will you be completing this work? It appears you are the main developer for the Slicer-DeepInfer extension.