Solution
Here is how I was able to solve it:
While importing the FBX file:
- It will open the file explorer at the beginning
- And in that window, at the bottom right, there is a dropdown list, it is set to all files by default which didn’t work → Sometimes freezes → Sometimes not
- Choose “FBX Skeletal Meshes (*.fbx)” from the dropdown list of file types
- If you import it like that, it imports very well
I hope it will help someone.
![enter image description here](https://i.sstatic.net/90P4N.png)