Here’s what worked for me (so far):
Disable TM Extension via Chrome>Extensions
Install TM Beta
Add WKOF, WKOFAF, Heatmap, Double-Check plugins
Disable TM Beta in Chrome>Extns
Close All Chrome Windows
Windows Task Mgr>Stop all Chrome processes (no idea if this helped, but I did it)
Restart Chrome
Enable TM Beta in Chrome>Extns
Refresh WK tab
Profit
Timeline, Double-Check and Heatmap all working.
So I guess it’s a TM/Chrome issue and the difference between TM and TM Beta is enough to solve it.
Edit: still getting all those errors in Console and more, but none seem to break it yet
