Is that using the “Create an internet shortcut and open it in default browser” code example, or just execute_shell_simple(url)? And is there a reason why you aren’t using url_open?
The internet shortcut approach should work so long as the user has an internet browser assigned in system settings. If the user cannot fix this on their end, you could offer an alternative approach that copies the url using clipboard_set_text.
Ah, it makes sense to me that it would say 'Application not found' if the user did not have one set in their system settings. Thanks for the response YAL.