Syntax error in script (line 31)

[racer2220]

Hello,

When creating an executable script (solvable_files.sh) it appears to be a syntax errro in line 31 (see screenshot)
Is this known an how can I fix it? The code has been copy pasted from github. (line 31 should be:
function correct_mtime() {

Greetings

[artonge]

The script should work with bash. You are using sh.

[ColiZei]

I have an error to.
In my case

./solvable_files.sh: line 171: syntax error near unexpected token `then'

$ echo $SHELL
/bin/bash

Any help?
Thanks!