Try any Hindi page. Ex: http://localhost:8000/hi/%E0%A4%95%E0%A5%83%E0%A4%B7%E0%A5%8D%E0%A4%A3%E0%A4%BF%E0%A4%95%E0%A4%BE
You will find the error output in the terminal where you started the server:
[SyntaxError: Invalid regular expression: /^([a-z\x{0900}-\x{0963}\x{0966}-\x{A8E0}-\x{A8FF}]+)/: Range out of order in character class]
Version: unspecified
Severity: normal