[wiltsenator]

Are you able to sign into facebook on your chromebook with another persons account, and then try doing the same action? And or trying the same action with your account on a different device? We want to make sure the issue is the device and not your account. (is it possible your account is banned on marketplace?)

I would personally make sure your chromebook and the facebook/chrome app you're using it completely up to date. Then restart the chromebook (not just sleep, make sure it fully turns off, you can do this by holding the power button for 10 full seconds)