Click and Drag no longer working

I've been using a very basic macro for quite some time, to take screenshots of textbooks which are not downloadable, then combine the screenshots into a pdf. However, today I tried using the macro again, and it doesn't work anymore, as it doesn't drag after pressing Shift-Command-4. Please help!

Repeat.kmmacros (3.5 KB)

Please help.

Repeat1.kmmacros (6.5 KB)