My first guess, maybe it was not right saved with the cnc ending, or so?
(I opened with wordpad (editor) and hit strg+s, so no ending was messed off)
I use win10, latest updates.
Lets have another try, please change the ending to gcode and try your file again.
Then i tried both files and they worked (tansfered over wifi, tooled from the touchscreen), what version of Luban and firmware do you run?
Firmware 1.10.1_20200822
Touchscreen V1.10.0
Controller V3.2.2
Luban 3.9.0 Snapmaker Luban Downloads and Updates