My browser / operating system: Windows 10.0, Chrome 86.0.4240.75, No Flash version detected

I am attempting my first scratch project which uses the ‘when timer > 10’ event block, when I attempt to drag this block into my code area none of the other code runs. The green flag has a light blue highlight around it and I cant click on it, clicking on the red stop button also does nothing. I can't find any reference to this bug, please help, thanks.

The timer is the time since the green flag was clicked and continues to run after the project is stopped.

The block will activate the code if the timer reaches 10 seconds. So you may have to wait a maximum of 10 seconds.

(ツ::#000)//Master Kakawam, slays evil kumquats.