Tracker Box goes black.

Whenever I use the DaVinci Resolve's (20.0) tracker node, the tracker box goes black. I'm not only having this issue. This issue I'm facing after upgrading the software from 19.4 to 20.0. The tracker node works fine in 19.4, but somehow it seems buggy in 20.0.
I'm using DaVinci Resolve Free version.
I'm using DaVinci Resolve Free version.