Why is the CGI script not executing?

Question

linux

I run the CGI server built into Python3. The script itself is under the spoiler

spoiler

#!/usr/bin/python3
print("Content-type: text/html")
print()
print("Hello world!")

In the browser I get a blank screen, a log from the console on the screen.

What am I doing wrong? OC Ubuntu 18.04, sudo doesn't help.

Answer 1

The problem on Ubuntu 18.04 was solved by this chmod a+x/path_to_cgi_script