Smart track doesn't work

I started a file for my floor plan of my apartment in my university with windows. Now I’m trying to go on with this project but somehow my smart track doesn’t work and I can’t draw correct lines…
Can somebody help me please…?

Exactly what is the problem? Does it not work even if activated? Not working but not activated?

Also check the settings. ⌘ +, >modeling aids >SmartTrack and guides. Verify that the osnaps are active in the tooltip menu of the cursor
Verify that SmartTrack is activated on Permanent
if this does not solve tryto activate the help on the sidebar and then type _SmartTrack

-Simon