My QGIS 3.8 doesn't support Auto Trace 1.0.6 or 1.0.7. My pc has a 64bit Windows 10. How can I solve it?
The AutoTrace plugin can only be installed in versions 2.x of QGIS so you can not install it in a version 3.x installation.
The functionality of the AutoTrace plugin is now available on the Snapping toolbar (you will probably need to enable this).