discuss.answer
I have similar bug, I had dev address for modx and migx worked fine, but now as I published modx to different domain, it only loads.
It still has the old information it works, but cant edit them or add new items.
*EDIT*
Own fault, didnt change /assets/-url, rookie mistake
[ed. note: mikmaister last edited this post 10 years, 7 months ago.]