I am surprised that it didn't work. I have tested it on same device as yours, at first didn't work and got error message just like this one but after improvements on a code it worked. Maybe you could uninstall what you have and install back?! Appreciate you are sticking around as we solve this, you won't regret it :)
RE: eSteem - Android v1.4.5, Schedule posts, Bandwidth saver, language, improvements