Hello ! im sory if my english bad, but i have sampe problem here and the way i fixed it just open your file manager and go to /usr/share/bin and you will find this 2 file Image
right click at the that folder (usr/share/bin) and open in terminal, after that just run the HDSENTINEL_GUI with sudo acces. if you do not know how to do it just type sudo ./HDSentinel_GUI
Image
and in my case, HDSentinel is open with no error
https://www.hdsentinel.com/hard_disk_sentinel_linux.php