Error occurred Repeats and field-list are not supported

Here is my error occurred. Please explain where I made mistake.
erode-tree-map.xlsx (35.0 KB)

Do you want all the questions for a tree to be on one screen?
I think you just need to move the appearance=field-list from line 10 (on the begin_group) and put it on line 11 instead (on the begin_repeat).