Thread:Extension talk:Push/Authentication question/reply (11)

I had the same problem ("Could not obtain an edit token on the target wiki."), it was something to do with my target media wiki installation, I re-installed a clean version (version 1.19.2) and it worked for me. This is a little vague sorry but perhaps that might help you if it isn't too much to do a reinstall, certainly something to try if you don't have any better options.