There is a problem with the formatting of the file. There are 25(!) newlines at the beginning of the file, so that if you start the script, you will get the following error message:

Failed to execute process '/usr/bin/startx'. Reason:
exec: Exec format error
The file '/usr/bin/startx' is marked as an executable but could not be run by the operating system.

To fix this bug, you just have to reformat the file (you also can remove the blanklines in the end of the file).