Translation:Don't give it back to her; we still need it.
The rule to drop the "s" at the end in the imperative tense applies only to verbs ending in "er". https://www.frenchtoday.com/blog/french-verb-conjugation/french-imperative/#2-beware-of-the-tu-form-of-the-french-er-verbs-in-the-imperative
'him' is not accepted, and the unit being new is frankly absolutely no excuse (although as you say, I am sure this is why). This is purely poor programming on the part of DL. And they want to go public! I won't be buying shares. Get a decent programmer! Reported it today