Power Query, Problem with combine inconsistent column files in a folder

[Eric Tsang]

Dear all

I have another problem with Power Query , to combine files (with different column) in a folder.

See the attached files,

I have April & May files in One folder, and want to combine them into the April_May file.
However, error occurs , i try many times but still invain.

If i have them in one sheet, get data from tables, it is fine

Any help would appreciated

Eric