Nora said:

usually I'd get the option to liberate myself when under siege. I no longer get that option.  refreshed game, refreshed browser, restarted comp all to no avail.   

A liberate button appear under your keep, when you hover next to the pictures. You can liberate yourself there. Or your friends and neighbors can do so by sending you reinforcements(offense). 

A noticed Bug that appears when you press liberate, a keep menu opens up. instead of taking you to the catacombs. I have notified the support about these.