1st bar ( "one after another Key" shortcuts )
while typing,   a text string  appears or your typed string disappears
reason your desired shortcut or a part of it still exists as a shortcut
FIX try a different shortcut
If you decided to change a character whilst the setup, delete all and type your new shortcut from the beginning for a  "shortcut live monitoring"

2nd bar ("single key or 2 key shortcut")
a messege box appears  "your shortcut does not exist in  your current keyboard layout"
reason caused by  typos lslt  &  x ,  removed whitspaces  x&1 or the & behind a single key  f7 &

FIX click the H tray icon and change the shortcut strings to lalt  &  x,  x & z or f7 in the 3rd last line, if you are able to reload the script fast via a click on a shortcut or on the exe.
The second way with the build in autoreload is to delete the last lines
~..
...
return

and to start from the beginning