Kata 35 "Running commands in shell"

[usr345]

OS: Ubuntu Linux 20.04
Vim version 9.0.749

I opened the file of kata 35 and executed this command: ":write !sh - will write this file (a vim command) and start a shell"

But instead of starting the shell I got the error:

:write !sh
sh: 3: 1.: not found
sh: 5: Syntax error: "(" unexpected

shell returned 2

Tried on another computer:

Linux Slackware 15.0
Vim version 9.0.2127

:write !sh

Press ENTER or type command to continue

But I see no shell. Is it the correct behavour? Should it start the sh process not showing me the prompt?
What should be the ideal behaviour for this command? What do you get?

[adomokos]

I've been using MacOS, I wonder if this is happening there.

[usr345]

I've been using MacOS, I wonder if this is happening there.

Please, look and let me know.