Same problem "The clipper couldn't start on this page..." dialog
Happens on some pages and not on others. When it does not work seems to be related to how long since I reloaded the page. If I reload and click immediately it often works, If I wait 5 minutes it does not. Wondering if some kind of memory leak is going on in the clipper code.
I tried the workarounds
uninstall clipper and reinstall
reload page (this sometimes works, not always)
unchecked keyboard shortcuts (it was turned off when I reinstalled 6.10 clipper)
have latest clipper and Chrome